OMB No. 1545-0123
Form 8879-C                 IRS e-file Signature Authorization for Form 1120
                            For calendar year 2021, or tax year beginning            , 2021, ending               , 20
Department of the Treasury                ▶ Do not send to the IRS. Keep for your records.                                          2021
Internal Revenue Service           ▶ Go to www.irs.gov/Form8879C for the latest information.
Name of corporation                                                                                        Employer identification number 

Part I   Tax Return Information (Whole dollars only) 
1    Total income (Form 1120, line 11)  . .  . .      . .                 . . . . .  . . . .        . .  . . .   .    . .         1 
2    Taxable income (Form 1120, line 30)  .  . .      . .                 . . . . .  . . . .        . .  . . .   .    . .         2 
3    Total tax (Form 1120, line 31)  . .  .  . .      . .                 . . . . .  . . . .        . .  . . .   .    . .         3 
4    Amount owed (Form 1120, line 35)     .  . .      . .                 . . . . .  . . . .        . .  . . .   .    . .         4 
5    Overpayment (Form 1120, line 36) .   .  . .      . .                 . . . . .  . . . .        . .  . . .   .    . .         5 
Part II  Declaration and Signature Authorization of Officer. Be sure to get a copy of the corporation’s return. 
Under penalties of perjury, I declare that I am an officer of the above corporation and that I have examined a copy of the corporation’s 
2021 electronic income tax return and accompanying schedules and statements and to the best of my knowledge and belief, it is 
true, correct, and complete. I further declare that the amounts in Part I above are the amounts shown on the copy of the corporation’s 
electronic income tax return. I consent to allow my electronic return originator (ERO), transmitter, or intermediate service provider to 
send the corporation’s return to the IRS and to receive from the IRS (a) an acknowledgement of receipt or reason for rejection of the 
transmission,   (b) the reason for any delay in processing the return or refund, and (c)            the date of any refund. If applicable, I authorize 
the  U.S.  Treasury  and  its  designated  Financial  Agent  to  initiate  an  electronic  funds  withdrawal  (direct  debit)  entry  to  the  financial 
institution account indicated in the tax preparation software for payment of the corporation’s federal taxes owed on this return, and 
the financial institution to debit the entry to this account. To revoke a payment, I must contact the U.S. Treasury Financial Agent at 
1-888-353-4537 no later than 2 business days prior to the payment (settlement) date. I also authorize the financial institutions involved 
in the processing of the electronic payment of taxes to receive confidential information necessary to answer inquiries and resolve 
issues related to the payment. I have selected a personal identification number (PIN) as my signature for the corporation’s electronic 
income tax return and, if applicable, the corporation’s consent to electronic funds withdrawal. 
Officer’s PIN: check one box only 

         I authorize                                                                   to enter my PIN                            as my signature 
                                          ERO firm name                                                    do not enter all zeros 
         on the corporation’s 2021 electronically filed income tax return. 

         As an officer of the corporation, I will enter my PIN as my signature on the corporation’s 2021 electronically filed income tax 
         return. 
Officer’s signature ▶                                                           Date ▶                     Title ▶

Part III Certification and Authentication 

ERO’s EFIN/PIN. Enter your six-digit EFIN followed by your five-digit self-selected PIN. 
                                                                                                                        do not enter all zeros 
I  certify  that  the  above  numeric  entry  is  my  PIN,  which  is  my  signature  on  the  2021  electronically  filed  income  tax  return  for  the 
corporation indicated above. I confirm that I am submitting this return in accordance with the requirements of              Pub. 3112, IRS     e-file 
Application and Participation, and Pub. 4163, Modernized e-File (MeF) Information for Authorized IRS                  e-file Providers for Business 
Returns. 

ERO’s signature ▶                                                                                   Date ▶

                                   ERO Must Retain This Form — See Instructions   
                            Do Not Submit This Form to the IRS Unless Requested To Do So 

For Paperwork Reduction Act Notice, see instructions.                                  Cat. No. 36359A                            Form 8879-C (2021)

Form 8879-C (2021)                                                                                                            Page  2 

Future Developments                          Officer Responsibilities                     Paperwork Reduction Act Notice. We  
                                                                                          ask for the information on this form to  
For the latest information about             The corporate officer will:                  carry out the Internal Revenue laws of  
developments related to Form 8879-C          • Verify the accuracy of the                 the United States. You are required to  
and its instructions, such as legislation    corporation’s income tax return;             give us the information. We need it to  
enacted after they were published, visit                                                  ensure that you are complying with these 
www.irs.gov/Form8879C.                       • Check the appropriate box in Part II to    laws and to allow us to figure and  
                                             either authorize the ERO to enter the        collect the right amount of tax. 
Purpose of Form                              officer’s PIN or to choose to enter it in  
                                             person;                                      You are not required to provide the  
A corporate officer and an electronic                                                     information requested on a form that is  
return originator (ERO) use Form 8879-C      • Indicate or verify his or her PIN when     subject to the Paperwork Reduction Act  
when the corporate officer wants to use      authorizing the ERO to enter it (the PIN     unless the form displays a valid OMB  
a personal identification number (PIN) to    must be five digits other than all zeros);   control number. Books or records  
electronically sign a corporation’s          • Sign, date, and enter his or her title in  relating to a form or its instructions must  
electronic income tax return and, if         Part II; and                                 be retained as long as their contents  
applicable, consent to electronic funds                                                   may become material in the  
withdrawal. A corporate officer who          • Return the completed Form 8879-C to  
does not use Form 8879-C must use            the ERO. The acceptable delivery             administration of any Internal Revenue  
Form 8453-C, U.S. Corporation Income         methods include hand delivery, U.S.          law. Generally, tax returns and return  
Tax Declaration for an IRS e-file Return.    mail, private delivery service, email,       information are confidential, as required  
For more information, see the                Internet website, and fax.                   by Internal Revenue Code section 6103. 
instructions for Form 8453-C.                The corporation’s return will not be         The time needed to complete and file 
Do not send this form to the IRS.            transmitted to the IRS until the ERO         this form will vary depending on 
The ERO must retain Form 8879-C.             receives the officer’s signed Form           individual circumstances. The estimated 
                                             8879-C.                                      burden for business taxpayers filing this 
                                                                                          form is approved under OMB control 
ERO Responsibilities                                                                      number 1545-0123 and is included in the 
                                             Important Notes for EROs 
The ERO will:                                                                             estimates shown in the instructions for 
                                             • Do not send Form 8879-C to the IRS         their business income tax return.
•  Enter the name and employer               unless requested to do so. Retain the 
identification number of the corporation     completed Form 8879-C for 3 years            Comments. You can send us comments 
at the top of the form;                      from the return due date or IRS received     through www.irs.gov/FormComments. 
• Complete Part I using the amounts          date, whichever is later. Form 8879-C        You can also send your comments to: 
(zeros may be entered when appropriate)      can be retained electronically in            Internal Revenue Service, Tax Forms and 
from the corporation’s 2021 income tax       accordance with the recordkeeping            Publications Division, 1111 Constitution 
return;                                      guidelines in Rev. Proc. 97-22, which is     Ave. NW, IR-6526, Washington, DC  
                                             on page 9 of Internal Revenue Bulletin       20224. Do not send the form to this 
• Enter on the authorization line in Part II 1997-13 at www.irs.gov/pub/irs-irbs/         address. Instead, keep it for your 
the ERO firm name (not the name of the       irb97-13.pdf.                                records.
individual preparing the return) if the 
ERO is authorized to enter the officer’s     • Enter the corporate officer’s PIN on the 
PIN;                                         input screen only if the corporate officer 
                                             has authorized you to do so. 
• Give the officer Form 8879-C for  
completion and review (acceptable            • Provide the officer with a copy of the 
delivery methods include hand delivery,      signed Form 8879-C upon request.
U.S. mail, private delivery service, email,  • Provide the officer with a corrected 
Internet website, and fax); and              copy of Form 8879-C if changes are 
• Complete Part III including a signature    made to the return (for example, based 
and date.                                    on the officer’s review).
          You must receive the               • See Pub. 4163, Modernized e-File 
          completed and signed Form          (MeF) Information for Authorized IRS 
▲!        8879-C from the officer            e-file Providers for Business Returns, for 
CAUTION   before the electronic return is    more information. 
transmitted (or released for transmission).