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Form IL-941 Information and Instructions

Important Information

Who must file Form IL-941?
You must file Form IL-941 if you paid amounts subject to Illinois withholding income tax (either required or by voluntary
agreement), such as:
• Wages and other employee compensation including bonus, overtime, and commission pay, usually reported to the recipient
on a Form W-2.
• Non-wage income such as pensions, annuities, unemployment income, and sick pay for which you have voluntarily agreed
to withhold Illinois taxes, usually reported to a recipient on a Form 1099.
• Gambling, lottery winnings, pari-mutuel wagering or sports wagering winnings over $1,000 (paid by the entity issuing the
winnings such as the Illinois Lottery or a casino), usually reported to a recipient on a Form W-2G.
• Amounts paid to purchase rights to Illinois lottery winnings reported on a Form 1099-MISC.
Note: Form IL-941 is the only form used to report Illinois income tax withholding with the exception of household employee
withholding, which can be reported on Form IL-1040, Individual Income Tax return. If you have household employees, see
Publication 121, Illinois Income Tax Withholding for Household Employees.
For more information, see Publication 130, Who is Required to Withhold Illinois Income Tax.
You must file Form IL-941 even if no tax was withheld during the reporting period (e.g., employees who are seasonal
workers). If you permanently discontinue having Illinois employees or payees, complete IL-941, Step 2, Line B, for your final
reporting period.

When is my Form IL-941 return due?
Your Form IL-941 is due quarterly. See the box to the When to File Form IL-941
right. 2022 Withholding Income Tax Payment and Filing Your Form IL-941 is due by the last day of the month that follows the end
Due Dates. of the quarter.
Unlike the federal government, Illinois does not require
an annual reconciliation return. If you submit an annual The quarter includes... Quarter ends IL-941 is due
reconciliation return, it will cause processing delays and an
error on your withholding account. 1. January, February, March March 31 May 2
2. April, May, June June 30 August 1
For more information, see the “End of the Year Instructions,”
after the “Step by Step Instructions” section. 3. July, August, September September 30 October 31
4. October, November, December December 31 January 31
*Note: If the due date falls on a weekend or holiday, the
return is due on the next business day.

IL-941 Instructions (R-12/21) Page 1 of 10

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Form IL-941 Information and Instructions

How can I file or pay electronically?
We encourage you to file your Form IL-941 and make your IL-501 payments electronically.
To file — You may use
• MyTax Illinois
• an IDOR-approved tax-prep software program (software you develop or purchase off-the-shelf) to file electronically.
To pay — You may use
• MyTax Illinois
• an IDOR-approved tax-prep software program, or
• ACH Credit payment option.
MyTax Illinois is our online account filing and management program that is available to you, free of charge, to file, pay, and
monitor your Illinois tax accounts.
NOTE: Any Forms IL-941 and IL-941-X filers with more than 32,767 employees cannot use MyTax Illinois and must use
third-party software to file their return.
Electronic Requirements for Illinois Withholding Income Tax:
• You are required to electronically submit Forms W-2, W-2c, and W-2G to Illinois. If you are unable to do so, you can complete
Form IL-900-EW to request a waiver. See Publication 110, Forms W-2, W-2c, W-2G, and 1099 Filing and Storage
Requirements for Employers and Payers, including new 1099-K Electronic Filing Requirements or additional information.
• You must file Forms IL-941 electronically. If you are unable to do so, you can complete Form IL-900-EW to request a waiver.
• You must make withholding tax payments electronically if you are assigned to the semi-weekly payment schedule.
What do I need to attach to my Form IL-941 as support?
You must attach your completed Schedule P, Illinois Withholding Schedule, to report specific withholding information, and if
required, the new Schedule WC, Withholding Income Tax Credits, to calculate the credits available for use.

Where do I report the amount of Illinois Income Tax I withheld
from my employees’ or others’ pay? First month of quarter:
You must report the amount of Illinois Income Tax you withheld, based 15 $300.00
upon the date you issued payroll, on Step 4 of your IL-941 return.
For example: 30 $300.00
• You withheld Illinois income tax from your payroll on January 15 and 2a January withholding = $600.00
January 30 of $300.00 each. On the first month of the quarter, enter 2b cont. (amount from 2a) =$600.00
$300.00 on the 15th and the 30th. Then enter the total of $600.00 for
your January payroll on Line 2a and Line 2b.
• You withheld Illinois income tax from your payroll on February 15 of Second month of quarter:

$225.00 and February 28 of $300.00 On the second month of the 15 $225.00
quarter, enter $225.00 on the 15th and $300 on the 28th. Then enter the
total of $525.00 from your employees’ pay for your February payroll on 28 $300.00
Line 2c. 2c February withholding = $525.00
• You withheld Illinois income tax from your payroll on March 15 and March
30 of $300.00 each. On the third month of the quarter, enter $300.00
Third month of quarter:
on the 15th and the 30th. Then, enter the total of $600.00 from your
employees’ pay for your March payroll on Line 2d. 15 $300.00
• Add Lines 2b, 2c, and 2d.
30 $300.00
• On your Form IL-941 submitted by May 2nd for the first quarter, you 2d March withholding = $600.00
would report $1,725.00 on Line 2.
Note: In Step 4, make sure to report the amount withheld for Illinois, not the
amount of your payees’ income. Total income should be entered on Line 1. 1st quarter Form IL-941,
Line 2 = $1,725.00
Do I report an amount on every line in Step 4?
No. You must report withholding amounts only on the days you issued payroll and on the total Lines 2a, 2b, 2c, and 2d. The lines for
the days where there was no withholding may remain blank. For example, if you have 2 payroll days per month on the 15th and the
28th, then Step 4 should look like this:

IL-941 Instructions (R-12/21) Page 2 of 10

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Form IL-941 Information and Instructions

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                              S A M P L E                             850.00

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                                 425.00

                                                                      850.00

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                                                                            2,550.00

IL-941 Instructions (R-12/21)                                         Page 3 of 10

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Form IL-941 Information and Instructions

Note: If the due date falls on a weekend or holiday, the payment is due on the next business day.
The 2022 due dates can be found at 2022 Withholding Income Tax Payment and Filing Due dates.
How is my payment frequency determined?
Payment due dates are determined by the payment schedule we assign to you based on your liability during the “look-back”
period, and the day you pay your payees from whom tax is withheld, orif you reach the $12,000 threshold during a quarter.
Annually, we review the total amount, as reported on returns filed, that was withheld during the “look-back” period. The “look-
back” period is the one-year period ending on June 30 of the immediately preceding calendar year. For calendar year 2022,
the “look-back” period is July 1, 2020, through June 30, 2021. At the end of the annual review, we notify you if your payment
frequency changes.
• Monthly
• First-time taxpayers and taxpayers who have reported $12,000 or less in withholding during the “look-back” period, are
assigned to the monthly payment schedule.
• Semi-weekly
• If you reported more than $12,000 in withholding during the “look-back” period, you are assigned to the semi-weekly
payment schedule.
• If you exceed $12,000 in withholding during a quarter, it is your responsibility to begin to pay your Illinois withholding
income tax semi-weekly in the following quarter, the remainder of the year, and the subsequent year.
Electronic requirements for Illinois withholding income tax: You must make withholding tax payments electronically if you
are assigned to the semi-weekly payment schedule.
For more information, seePublication 131, Withholding Income Tax Payment and Filing Requirements.
Note: You will owe a late-payment penalty if you do not pay the tax you owe by each payment due date. For more information,
see Publication 103, Penalties and Interest for Illinois Taxes.
How do I calculate how much my IL-501 payments should be?
The IL-501 payments you make should be the exact amount you withheld from your payee minus any credits you may
have available. For example:
Example 1 (no credits)
Your January 1- January 15 payroll totaled $15,000.00; you actually withheld Illinois Payroll total = $15,000.00
income tax totaling $600.00 from your employees’ pay; and you have no available IL withholding total = $600.00
credits on your account. Your IL-501 payment should be $600.00. Credits = $ 0.00
IL-501 payment = $600.00
Example 2 (with credits)
Your January 1- January 15 payroll totaled $15,000.00; you actually withheld Illinois
income tax totaling $600.00 from your employees’ pay; and you received Payroll total = $15,000.00
an EDGE credit of $250.00 that was available for use. Your IL-501 payment should be IL withholding total = $600.00
$350.00. See the boxes to the right. EDGE credit = - $250.00
IL-501 payment = $350.00
Do I figure my own penalties or interest?
You are not expected to figure your own penalties and interest. We will bill you for penalties and interest, if applicable. For more
information about penalties and interest, see Publication 103, Penalties and Interest for Illinois Taxes.
How do I correct a misapplied payment I made to IDOR?
A payment may be eligible to be moved from one period to another period only if it has not been used to satisfy a liability. If you
made the payment through MyTax Illinois, you can withdraw the payment request while it is in “pending” status and schedule a
new payment. Once the payment posts, you must send a written request to us to have the payment moved. In your written request,
please include your account number; the amount and date of the payment; to what period you are requesting it be applied; and the
reason for your request to move the payment. Also include a complete list of payment amounts and dates for the period to which you
are moving it. Send the request to the address listed in the “Where do I get help?” box on Page 6.
How do I correct an error if I over-withheld or under-withheld from a payee?
The method for correcting an error on withholding is determined by the time of year that the error is made. If you over-withheld or
under-withheld prior to the end of the calendar year, you may simply correct it in future payroll cycles within the same calendar year
by adjusting the amount you withhold by the amount of the over-withholding or under-withholding. Amounts reported on Form IL-941
always must be the exact amounts withheld from payees. If you do not make the correction before the end of the calendar
year, you must report the amount actually withheld on the W-2 or 1099 forms for the payee to claim on his/her income
tax return. Do not try to correct this issue by issuing a W-2c to change the withholding amount. Your employee or other individual
from whom you withheld will either receive a refund of the over-withheld amount or have to pay the under-withheld amount on their
Individual Income Tax Return.

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         Form IL-941 Information and Instructions

Examples 
• If you withheld too much from an employee during the 1st quarter, you may withhold less during the 2nd quarter to make up for 
  the overage.  On your Form IL-941, report the exact amount you withheld during the quarter. 
• If you withheld too little from your employee during the January 15th payroll, you may withhold more during the February 15th 
  payroll.  On your Form IL-941, report the exact amount you withheld during the quarter. 
• Important: You realize, after you issued the employee’s W-2 for the calendar year, you withheld too much from the employee in 
  the 3rd quarter, however you reported the exact amount you withheld on your 3rd quarter Form IL-941 and Form W-2 for that 
  employee for that year. Even though the amount you withheld was not correct, do not refund the over-withheld amount to the 
  employee, do not file an amended return, and do not file an amended W-2 changing the withholding amount.  The amount 
  you reported on your Form IL-941 and your employee’s Form W-2 is correct in that the amount was exactly what you withheld. 
  The over-withheld amount will be credited to the taxpayer when he or she files his or her individual income tax return. Note: If 
  the wages reported were incorrect, you will need to issue a corrected W-2 to report the correct amount of Illinois wages, but the 
  Illinois withholding should not change.

How do I correct withholding that I have over-reported or under-reported?
You must always report the exact amount of tax that you actually withheld during the reporting period on your Form IL-941.  If the 
amount you reported was more or less than the amount you actually withheld, then you must file an amended return (IL-941-X).  

What form do I use to report my employees’ or payees’ income and withholding at the end of the year?

You must report income and withholding on the correct withholding form type listed in the chart below.  Refer to the Internal Revenue 
Service website at irs.gov, for more information.

                              Type of Income                                     Withholding Form Type
                              Payroll                                            W-2
                              Compensation                                       W-2 or 1099 series
                              Gambling winnings                                  W-2G
                              Illinois Lottery                                   W-2G
                              Winnings
                              Amount paid to purchase rights to Illinois Lottery 1099-MISC
                              Winnings

                              Voluntary Withholding Agreement —                  1099 series
                              Unemployment, Retirement, Interest or Dividend 
                              Income 

                              Other                                              1099 series

IL-941 Instructions (R-12/21)                                                                         Page 5 of 10

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Form IL-941 Information and Instructions

Form IL-941 Step-by-Step Instructions
Follow the instructions on the form. Do not file more than one Form IL-941 per quarter.
Step 1: Provide your information
Enter your information and check any box that is applicable. Where do I get help?
Note: Your sequence number should be “000” unless you have been assigned a • Visit our website at tax.illinois.gov
different sequence number when you registered. • Call us at 1 800 732-8866 or
Reporting Period — Complete this section. 217 782-3336
Check the correct quarter you are reporting (even if you have no withholding to • Call our TDD (telecommunications
report). File one return for each quarter. Do not file an annual return. device for the deaf) at 1 800 544-5304
• Write to
Step 2: Tell us about your business ILLINOIS DEPARTMENT OF REVENUE
Complete Items A and B only if this is your 4th quarter return or you have PO BOX 19001
permanently stopped withholding and this is your final return. SPRINGFIELD IL 62794-9001
Item A1 —Enter thetotal number of W-2 forms reporting Illinois withholding you
were required to issue for the entire year. Only complete this line when you file
your 4th quarter or final return.
Item A2 — Enter thetotal number of 1099 forms reporting Illinois withholding you
were required to issue for the entire year. Only complete this line when you file your
4th quarter or final return.
Item B — Check this box and enter the date you stopped withholding, if applicable.

Step 3: Tell us about the amount subject to withholding
Line 1 — Enter the total of all amounts subject to Illinois withholding income tax (either required or by voluntary agreement)
including payroll, compensation, gambling winnings (such as Illinois Lottery winnings), amounts paid to purchase the rights
to Illinois Lottery winnings, or any other non-wage income. Do not leave blank - if you had no amount subject to Illinois
withholding, enter zero.
Step 4: Tell us about the amount withheld
Line 2 — Enter the exact amount of Illinois income tax you withheld from your employees or others on the date you paid the
compensation. This step is separated by month and lists every day in each month. Enter the amount of Illinois income tax you
withheld from your employees or payees on the exact day you paid the amount from which you withheld tax.

1. Enter the amount of Illinois income tax you withheld from your employees’ or payees’ income on the exact day you withheld
it. Do not write this amount on the day you made your deposit — it must be the day you made your payroll or compensation
payments. For example, if your payroll is paid on January 15 and January 30 and you withheld a total of $300.00 each
payroll, you will enter $300 on the 15th and $300.00 on the 30th in the “First month of quarter” section.

15 $300.00
30 $300.00

2. For each month add the daily amounts to determine the total tax withheld for the month and enter the total in the space
provided. Do not leave the total lines (Lines 2a, 2b, 2c, and 2d) for Line 2 blank- if you did not withhold during this
period, enter zero. For this example, you would enter $600 on Line 2a.

$600.00

3. For each quarter, add the amounts from Lines 2b, 2c, and 2d, and enter the total on the line provided and on Form IL-941,
Line 2. Do not leave Line 2 blank- if you did not withhold during this period, enter zero.

$1,800.00

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         Form IL-941 Information and Instructions

IMPORTANT:  Enter the total of all amounts of Illinois Income Tax actually withheld (either required or by voluntary agreement) 
this reporting period, even if you are able to use a credit to pay your withholding liability.  This includes employee withholding 
and any withholding that was made on other Illinois income. Do not estimate this amount.  
Step 5: Tell us about your payments and credits
Note: The Department applies credits and payments in a specific order.  The withholding credits (Line 3) are applied 
first, and then the payments (Line 4).  
Line 3 — Enter the amount from Schedule WC, Line 7. If you are claiming a credit, you must attach Illinois Schedule WC and 
any other required support listed on Schedule WC. For more information, see Illinois Schedule WC Instructions, and Schedule 
WC-I, Withholding Income Tax Credits Information and Worksheets. 
Line 4 — Enter the total amount of withholding payments you have made during this period. This includes all IL-501 payments 
(electronic and paper coupons). Do not leave blank.

Line 5 —  Follow the instructions on the form. This is your total credits and payments.  

Step 6:  Figure your balance
Line 6 — Follow the instructions on the form. This is your balance due.  
If the total of your payments and credits on Line 5 is greater than your withholding amount on Line 2, review your amounts.  
You may have made an error on the amount you paid or credit claimed on Line 5 or the tax you reported on Line 2.  If your 
information is correct and you overpaid the withholding amount, enter zero on Line 6. Do not enter a negative number on 
Line 6. Any overpaid amount will not be issued as a refund until it has been verified.  

Step 7:  Sign here 
You, or a person authorized by you through a Power of Attorney form, must sign and date the first signature line of your return. 
If you do not sign your return, it will be considered not filed and you may be subject to a nonfiler penalty. 
The paid preparer information must be completed by an “income tax return preparer” whom you paid to complete the return 
and who is not your employee. The paid preparer’s IRS Preparer Tax Identification Number (PTIN) must be entered in the 
space provided. 
The term “income tax return preparer” is defined as “any person who prepares for compensation, or who employs one or more 
persons to prepare for compensation, any return of tax imposed by this Act or any claim for refund of tax imposed by this Act. 
The preparation of a substantial portion of a return or claim for refund shall be treated as the preparation of that return or claim 
for refund.” However, a person is not an income tax return preparer if all that the person does is furnish typing, reproducing, or 
other mechanical assistance. (IITA Section 1501(a)(26)). The Illinois definition of income tax return preparer is substantially the 
same as the IRS definition. Therefore, if the IRS does not consider you to be an income tax return preparer with respect to the 
corresponding U.S. Form 941, you will generally not be considered an income tax return preparer with respect to the IL-941. 
For example, if you are a reporting agent filing U.S. Form 8655 and you are not considered an income tax return preparer by 
the IRS because you fall within the mechanical assistance exception, then, provided you do not render any specific Illinois 
income tax advice, you will not be considered an income tax return preparer by the Department. 
If you want to allow the paid preparer to discuss this return with us, check the box and print the paid preparer’s name, the 
firm’s name, FEIN, address, and phone number. This authorization will allow your designee to answer any questions that arise 
during the processing of your return, call us with questions about your return, and receive or respond to notices we send. The 
authorization will automatically end no later than one year from the due date of this return. You may revoke the authorization at 
any time by calling or writing us.
NOTE: Form IL-941 has a scanline for automated processing that contains your FEIN, the reporting period, and a 
check digit. Do not photocopy the form and use for any other FEIN or reporting period.

IL-941 Instructions (R-12/21)                                                                                 Page 7 of 10

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Form IL-941 Information and Instructions

Schedule P Instructions

To complete Schedule P, Illinois Withholding Payroll Schedule, enter each payee’s/employee’s name, Social Security number,
income, and withholding amounts for the reporting period.
For income, enter the total wages subject to Illinois withholding income tax (either required or by voluntary agreement). Income
includes payroll, compensation, gambling winnings (such as Illinois Lottery and sports wagering winnings), amounts paid to
purchase the rights to Illinois Lottery winnings, or any other non-wage income.
NOTE: If you have zero wages and withholding for the reporting period, complete Schedule P by entering your business name,
FEIN, and zeroes in both the income and withholding columns.
If you fail to complete the Schedule P, you may receive a request for additional information.
Schedule P CSV file format and instructions for filing at MyTax Illinois
The CSV file format is used for importing Schedule P, Illinois Withholding Payroll Schedule, directly to a withholding account.
The import feature is recommended for users who have a spreadsheet software program that can create the CSV format. Using
a spreadsheet program (i.e., Excel), four columns are required to create a CSV file that is recognized and accepted by MyTax
Illinois.

Step 1: Create your spreadsheet
The spreadsheet should be set up as follows:

Field Name Maximum Length Data Entry Description
Column 1 Employee Name 30 characters Alpha/Numeric The full name of the employee. Do not enter periods
after initials.
For example, John R. Doe should be entered as
‘John R Doe’.
Column 2 SSN 9 characters Numeric The Social Security number of the employee. No
hyphens are necessary.
For example, 000-00-000 should be entered as
000000000.
Column 3 Income 13 characters Numeric The employee’s income for the quarter. Enter as
unformatted dollars and cents.
For example, $1,234.56 should be entered as
‘1234.56’ and $1,234.00 should be entered as
‘1234’.
Column 4 Withholding 13 characters Numeric The amount withheld on behalf of the employee
for the quarter. Enter as unformatted dollars and
cents.
For example, $1,234.56 should be entered as
‘1234.56’ and $1,234.00 should be entered as
‘1234’.

NOTE: You cannot import more than 32,767 rows. Any filers with more than 32,767 employees must use Federal/State
Employment Taxes (FSET) or third-party software to file the return. For additional information, see the FSET program.

CSV Spreadsheet Example (i.e. Excel)
John R Doe 000000000 1234.56 100

Text File Example (i.e. Notepad)
John R Doe,000000000,1234.56,100

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Form IL-941 Information and Instructions

Schedule P Instructions

When all employee data has been entered, the file is then saved. You will name the spreadsheet file accordingly and just below
the File Name is the ‘Save As’ box. In the most current version of Excel, you will click the scroll down arrow and select the ‘CSV
– (Comma delimited)’ option. For older versions of Excel, you will select the ‘CSV – Comma Separated Value’ option. This will
configure the spreadsheet into the format that is accepted by MyTax Illinois.

Step 2: Upload your spreadsheet to MyTax Illinois
Once the spreadsheet is complete, you will log on to MyTax Illinois, using your username and password. Click ‘Log In’ and follow
the steps below:
1. Click on ‘File a Return” in the Withholding account box.
2. Navigate to the appropriate filing period to file a return (Forms IL-941 and IL-941-X).
3. When completing the return, select the ‘Import payroll data from a saved file’ option.
4. On the following page, click the ‘Import Payroll Data’ option.
5. Select the CSV file saved on your computer by clicking ‘Choose File’.
6. Click on the file name of the file you want to import.
7. Click ‘Ok’.
8. The employee information will display and if everything is correct, you will select ‘Use Imported Payroll Data’.
9. After the file has imported, you may update or add individual rows to your Schedule P.
10. Click ‘Next’ to continue and complete your return.

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Form IL-941 Information and Instructions

End of the Year Instructions

At the end of the year, you (as the withholding agent) are required to report to your payee the total amount you withheld from
that payee on the appropriate form (i.e. W-2, W-2G, or 1099).

To verify your records, compare
1. the total Illinois withholding you reported to your payees on
Forms W-2, W-2G, W-2c, and 1099, 1. __________________
2. the total Illinois withholding amount you reported on your quarterly Forms IL-941, Line 2,
added together for the year.
Quarter 1 IL-941, Line 2 ____________
+ Quarter 2 IL-941, Line 2 ____________
+ Quarter 3 IL-941, Line 2 ____________
+ Quarter 4 IL-941, Line 2 ____________
2. __________________
3. your payments made to IDOR plus credits claimed for the year (Form IL-941, Line 5).
Quarter 1 IL-941, Line 5 ____________
+ Quarter 2 IL-941, Line 5 ____________
+ Quarter 3 IL-941, Line 5 ____________
+ Quarter 4 IL-941, Line 5 ____________
3. __________________
***The amounts on Lines 1, 2, and 3 should match. If they do not, then you need to review your account. See the “possible
errors” box.

Possible Errors for End of the Year Instructions
If the total for line then you may have...
#2 is greater than #1, underreported to your payees or overreported to IDOR.
#2 is greater than #3, underpaid or overreported to IDOR.
#1 is greater than #2, overreported to your payees or underreported to IDOR.
#1 is greater than #3, underpaid to IDOR or overreported to your payees.
#3 is greater than #2, overpaid to IDOR or underreported to IDOR.
#3 is greater than #1, overpaid to IDOR or underreported to your payees.

To correct an error, see sections “How do I correct an error if I over-withheld or under-withheld from a payee?” and “How do I
correct withholding that I have over-reported or under-reported?”
Note: If you made an error in the amount you reported to your employee or payee on the W-2, W-2G, or 1099 forms, you must
provide them with the correct amount on a W-2c or a corrected Form W-2G or Form 1099 as required by the Internal Revenue
Service. You must also file Form IL-941-X, Amended Illinois Withholding Income Tax Return, to report the corrected amounts.
The amount you withheld should always agree with the amount you report to us.
Important: According to Illinois regulations, an over-collection of withholding should not be corrected after the end of the
calendar year in which the over-collection occurred. If you over-collected Illinois withholding income tax and did not realize
your error until after the end of the calendar year, do not correct the withholding amount on your Form IL-941-X or Form
W-2c (as long as you reported the exact amount that was actually withheld). The actual amount withheld, including the over-
collection, will be credited to the employee when he or she reports the withholding amount shown on the W-2 when filing his or
her IL-1040.

IL-941 Instructions (R-12/21) Printed by authority of the state of Illinois - web only, one copy. Page 10 of 10

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