2023 Corporation Tax Forms

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Visit the Prior Year Income Tax Forms webpage.

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Form  ↓Status  ↓Date Posted  ↓Name/Description  ↓
Form 1CNSFINALOctober 27Composite Wisconsin Individual Income Tax Return for Nonresident Tax-Option (S) Corporation Shareholders
Form 1CNS InstructionsFINALMarch 21Form 1CNS Instructions
Form 4 (Fill-In Form)FINALJanuary 03Wisconsin Non-Combined Corporation Franchise or Income Tax Return Fill-In Form
Form 4 InstructionsFINALJanuary 05Instructions for Non-Combined Corporation Franchise or Income Tax Return
Form 4466W (Fill-In Form)FINALJanuary 03Wisconsin Corporation or Pass-Through Entity Application for Quick Refund of Overpayment of Estimated Tax Fill-In Form
Form 4BL (Fill-In Form)FINALJanuary 03Wisconsin Net Business Loss Carryforward for Separate Entity Corporations Fill-In Form
Form 4BL InstructionsFINALDecember 07Wisconsin Net Business Loss Carryforward for Separate Entity Corporations Instructions
Form 4H (Fill-In Form)FINALJanuary 03Wisconsin Corporation Declaration of Inactivity Fill-In Form
Form 4T (Fill-In Form)FINALJanuary 03Wisconsin Exempt Organization Business Franchise or Income Tax Return Fill-In Form
Form 4T InstructionsFINALDecember 15Wisconsin Exempt Organization Business Franchise or Income Tax Return Instructions
Form 5EFINALOctober 27Wisconsin Net Business Loss Carryforward for Separate Entity Corporations
Form 5RFINALOctober 27Wisconsin Revocation of Election by an S Corporation Not to Be a Tax-Option Corporation
Form 5SFINALOctober 27Wisconsin Tax-Option (S) Corporation Franchise or Income Tax Return
Form 5S InstructionsFINALMarch 21Wisconsin Tax-Option (S) Corporation Franchise or Income Tax Return Instructions
Form 6FINALAugust 20Wisconsin Combined Corporate Franchise or Income Tax Return
Form 6 InstructionsFINALJanuary 17Wisconsin Combined Corporate Franchise or Income Tax Return Instructions
Form 6BLFINALOctober 27Wisconsin Net Business Loss Carryforward for Combined Group Members
Form 6BL InstructionsFINALJanuary 03Wisconsin Net Business Loss Carryforward for Combined Group Members Instructions
Form 6CLFINALOctober 27Wisconsin Capital Loss Adjustment
Form 6CL InstructionsFINALJanuary 03Net Capital Loss Adjustments for Combined Group Members Instructions
Form 6CSFINALOctober 27Wisconsin Sharing of Research Credits
Form 6CS InstructionsFINALJanuary 03Wisconsin Sharing of Research Credits Instructions
Form 6IFINALOctober 27Wisconsin Adjustment for Insurance Companies
Form 6I InstructionsFINALJanuary 03Wisconsin Adjustment for Insurance Companies Instructions
Form 6YFINALOctober 27Wisconsin Modification for Dividends
Form 6Y InstructionsFINALJanuary 03Wisconsin Modification for Dividends Instructions
Form 9bFINALOctober 27Miscellaneous Income
Form C (Fill-In Form)FINALJanuary 03Wisconsin Allocation and Separate Accounting Data Fill-In Form
Form C InstructionsFINALDecember 07Wisconsin Allocation and Separate Accounting Data Instructions
Form Corp-ES InstructionsFINALMarch 06Wisconsin Corporation Estimated Tax Voucher Instructions, Interactive Voucher
Form C-PV InstructionsFINALMarch 18Wisconsin Corporation Payment Voucher, Interactive Voucher
Form CU (Fill-In Form)FINALJanuary 03Wisconsin Credit Union Declaration of Exempt Status Fill-In Form
Form HR-T (Fill-In Form)FINALApril 03Transfer of Supplement to the Federal Historic Rehabilitation Credit Fill-In Form
Form HR-T InstructionsFINALFebruary 10Transfer of Supplement to Federal Historic Rehabilitation Credit Instructions
Form N (Fill-In Form)FINALJanuary 03Wisconsin Nonapportionable, Separately Accounted, and Separately Apportioned Income Fill-In Form
Form N InstructionsFINALJanuary 03Wisconsin Nonapportionable, Separately Accounted, and Separately Apportioned Income Instructions
Form PW-1FINALOctober 27Wisconsin Nonresident Income or Franchise Tax Withholding on Pass-Through Entity Income
Form PW-1 InstructionsFINALNovember 01Wisconsin Nonresident Income or Franchise Tax Withholding on Pass-Through Entity Income Instructions
Form PW-2FINALAugust 30Wisconsin Nonresident Partner, Member, Shareholder, or Beneficiary Pass-Through Withholding Exemption Affidavit
Form PW-2 InstructionsFINALSeptember 25Wisconsin Nonresident Partner, Member, Shareholder, or Beneficiary Pass-Through Withholding Exemption Affidavit Instructions
My Tax Account e-filing
Form PW-ES InstructionsFINALJanuary 06Wisconsin Pass-Through Entity Withholding Payment Voucher Instructions, Interactive Voucher
Form PW-UFINALOctober 27Underpayment of Estimated Withholding Tax by Pass-Through Entities
Form PW-U InstructionsFINALNovember 01Underpayment of Estimated Withholding Tax by Pass-Through Entities Instructions
Form U (Fill-In Form)FINALJanuary 03Underpayment of Estimated Tax by Corporations Fill-In Form
Form U InstructionsFINALJanuary 08Underpayment of Estimated Tax by Corporations Instructions
Form WQOF (Fill-In Form)FINALMarch 22Wisconsin Qualified Opportunity Fund Certificate Fill-In Form
Form WQOF InstructionsFINALMarch 22Wisconsin Qualified Opportunity Fund Certificate Instructions
Form W-RA (Fill-In Form)FINALOctober 30Required Attachments for Electronic Filing Fill-In Form, Upload Attachments
Schedule 4I (Fill-In Form)FINALJanuary 03Wisconsin Adjustments for Insurance Companies Fill-In Form
Schedule 4I InstructionsFINALDecember 07Wisconsin Adjustments for Insurance Companies Instructions
Schedule 4V (Fill-In Form)FINALJanuary 03Wisconsin Additions to Federal Income Fill-In Form
Schedule 4V InstructionsFINALDecember 07Wisconsin Additions to Federal Income Instructions
Schedule 4W (Fill-In Form)FINALJanuary 03Wisconsin Subtractions From Federal Income Fill-In Form
Schedule 4W InstructionsFINALDecember 07Wisconsin Subtractions from Federal Income Instructions
Schedule 4Y (Fill-In Form)FINALJanuary 03Wisconsin Subtraction Modification for Dividends Fill-In Form
Schedule 4Y InstructionsFINALDecember 07Wisconsin Subtraction Modification for Dividends Instructions
Schedule 5K-1FINALOctober 27Tax-Option (S) Corporation Shareholder’s Share of Income, Deductions, Credits, etc.
Schedule 5K-1 InstructionsFINALMarch 21Shareholder's Instructions for Schedule 5K-1
Schedule 5S-ETFINALOctober 27Entity-Level Tax Computation
Schedule 5S-ET InstructionsFINALMarch 21Entity-Level Tax Computation Instructions
Schedule A-01 (Fill-In Form)FINALJanuary 03Wisconsin Single Sales Factor Apportionment Data for Nonspecialized Industries Fill-In Form
Schedule A-01 InstructionsFINALDecember 07Wisconsin Single Sales Factor Apportionment Data for Nonspecialized Industries Instructions
Schedule A-02 (Fill-In Form)FINALJanuary 03Wisconsin Apportionment Percentage for Interstate Financial Institutions Fill-In Form
Schedule A-02 InstructionsFINALJanuary 08Wisconsin Apportionment Percentage for Interstate Financial Institutions Instructions
Schedule A-03 (Fill-In Form)FINALJanuary 03Wisconsin Apportionment Percentage for Interstate Motor Carriers Fill-In Form
Schedule A-03 InstructionsFINALDecember 07Wisconsin Apportionment Percentage for Interstate Motor Carriers Instructions
Schedule A-04 (Fill-In Form)FINALJanuary 03Wisconsin Apportionment Percentage for Interstate Telecommunications Companies Fill-In Form
Schedule A-04 InstructionsFINALJanuary 03Wisconsin Apportionment Percentage for Interstate Telecommunications Companies Instructions
Schedule A-05 (Fill-In Form)FINALJanuary 03Wisconsin Premiums Factor for Insurance Companies Fill-In Form
Schedule A-05 InstructionsFINALDecember 07Wisconsin Premiums Factor for Insurance Companies Instructions
Schedule A-06 (Fill-In Form)FINALJanuary 03Wisconsin Receipts Factor for Interstate Brokers-Dealers, Investment Advisors, Investment Companies, and Underwriters Fill-In Form
Schedule A-06 InstructionsFINALJanuary 03Wisconsin Receipts Factor for Interstate Brokers-Dealers, Investment Advisors, Investment Companies, and Underwriters Instructions
Schedule A-07 (Fill-In Form)FINALJanuary 03Wisconsin Apportionment Percentage for Interstate Air Carriers Fill-In Form
Schedule A-07 InstructionsFINALDecember 07Wisconsin Apportionment Percentage for Interstate Air Carriers Instructions
Schedule A-08 (Fill-In Form)FINALJanuary 03Wisconsin Apportionment Percentage for Broadcasters Fill-In Form
Schedule A-08 InstructionsFINALJanuary 03Wisconsin Apportionment Percentage for Broadcasters Instructions
Schedule A-09 (Fill-In Form)FINALJanuary 03Wisconsin Apportionment Percentage for Interstate Railroads Fill-In Form
Schedule A-09 InstructionsFINALDecember 07Wisconsin Apportionment Percentage for Interstate Railroads Instructions
Schedule A-10 (Fill-In Form)FINALJanuary 03Wisconsin Apportionment Percentage for Interstate Pipeline Companies Fill-In Form
Schedule A-10 InstructionsFINALJanuary 03Wisconsin Apportionment Percentage for Interstate Pipeline Companies Instructions
Schedule A-11 (Fill-In Form)FINALJanuary 03Wisconsin Apportionment Percentage for Interstate Air Freight Forwarders Affiliated with a Direct Air Carrier Fill-In Form
Schedule A-11 InstructionsFINALDecember 07Wisconsin Apportionment Percentage for Interstate Air Freight Forwarders Affiliated with a Direct Air Carrier Instructions
Schedule AR (Fill-In Form)FINALOctober 30Explanation of Amended Return Fill-In Form
Schedule AR InstructionsFINALNovember 28Explanation of Amended Return Instructions
Schedule BD (Fill-In Form)FINALJanuary 03Business Development Credit Fill-In Form
Schedule CF (Fill-In Form)FINALOctober 30Carryforward of Unused Credits Fill-In Form
Schedule CF InstructionsFINALNovember 28Carryforward of Unused Credit Instructions
Schedule CM (Fill-In Form)FINALJanuary 03Community Rehabilitation Program Credit Fill-In Form
Schedule CM InstructionsFINALDecember 07Community Rehabilitation Program Credit Instructions
Schedule CR (Fill-In Form)FINALNovember 01Other Credits Fill-In Form
Schedule CR InstructionsFINALNovember 28Other Credits Instructions
Schedule CU-1 (Fill-In Form)FINALJanuary 03Credit Union Adjustment to Income Fill-In Form
Schedule CU-1 InstructionsFINALJanuary 03Credit Union Adjustment to Income Instructions
Schedule DC (Fill-In Form)FINALJanuary 03Wisconsin Development Zones Credits Fill-In Form
Schedule DC InstructionsFINALDecember 07Wisconsin Development Zones Credits Instructions
Schedule DE (Fill-In Form)FINALJanuary 03Disregarded Entity Schedule Fill-In Form
Schedule ECFINALOctober 31Enterprise Zone Jobs Credit
Schedule ED (Fill-In Form)FINALJanuary 03Wisconsin Economic Development Tax Credit Fill-In Form
Schedule ED InstructionsFINALDecember 07Wisconsin Economic Development Tax Credit Instructions
Schedule EITFINALOctober 27Electronics and Information Technology Manufacturing Zone Credit
Schedule EIT InstructionsFINALJanuary 17Electronics and Information Technology Manufacturing Zone Credit Instructions
Schedule ES (Fill-In Form)FINALJanuary 03Employee College Savings Account Contribution Credit Fill-In Form
Schedule ES InstructionsFINALDecember 07Employee College Savings Account Contribution Credit Instructions
Schedule ET-OSFINALOctober 27Credit for Net Tax Paid to Another State
Schedule ET-OS InstructionsFINALNovember 01Credit for Net Tax Paid to Another State Instructions
Schedule FC (Fill-In Form)FINALDecember 04Farmland Preservation Credit Fill-In Form
Schedule FC InstructionsFINALDecember 05Farmland Preservation Credit Instructions
Schedule FC-A (Fill-In Form)FINALDecember 07Farmland Preservation Credit Fill-In Form
Schedule FC-A InstructionsFINALDecember 07Farmland Preservation Credit Instructions
Schedule HR (Fill-In Form)FINALJanuary 03Wisconsin Historic Rehabilitation Credits Fill-in Form
Schedule HR InstructionsFINALFebruary 27Wisconsin Historic Rehabilitation Credits Instructions
Schedule HR-5 (Fill-in Form)FINALFebruary 09Wisconsin Supplement to the Federal Historic Rehabilitation Tax Credit – Five-Year Credit Claim Fill-in Form
Schedule HR-5 InstructionsFINALFebruary 09Wisconsin Supplement to the Federal Historic Rehabilitation Tax Credit - Five-Year Credit Claim Instructions
Schedule JTFINALNovember 15Wisconsin Jobs Tax Credit
Schedule LI (Fill-In Form)FINALJanuary 03Wisconsin Low-Income Housing Tax Credit Fill-In Form
Schedule LI InstructionsFINALJanuary 03Wisconsin Low-Income Housing Tax Credit Instructions
Schedule MA-A (Fill-In Form)FINALJanuary 03Wisconsin Agricultural Credit Fill-In Form
Schedule MA-A InstructionsFINALDecember 07Wisconsin Agricultural Credit Instructions
Schedule MA-M (Fill-In Form)FINALJanuary 03Wisconsin Manufacturing Credit Fill-In Form
Schedule MA-M InstructionsFINALDecember 07Wisconsin Manufacturing Credit Instructions
Schedule MS (Fill-In Form)FINALJanuary 03Wisconsin Manufacturer’s Sales Tax Credit Carryforward Allowable Fill-In Form
Schedule MS InstructionsFINALDecember 07Wisconsin Manufacturer’s Sales Tax Credit Carryforward Allowable Instructions
Schedule RFINALOctober 27Wisconsin Research Credits
Schedule R InstructionsFINALJanuary 03Wisconsin Research Credits Instructions
Schedule RT (Fill-In Form)FINALJanuary 03Wisconsin Related Entity Expenses Disclosure Statement Fill-In Form
Schedule RT InstructionsFINALJanuary 03Wisconsin Related Entity Expenses Disclosure Statement Instructions
Schedule RT-1 (Fill-In Form)FINALOctober 31Statement of Disallowed Related Entity Expenses Fill-In Form
Schedule RT-1 InstructionsFINALJanuary 03Statement of Disallowed Related Entity Expense Instructions
Schedule VC (Fill-In Form)FINALJanuary 03Wisconsin Venture Capital Credits Fill-In Form
Schedule VC InstructionsFINALDecember 07Wisconsin Venture Capital Credits Instructions
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