2026 Corporation Tax Forms

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Visit the Prior Year Income Tax Forms webpage.​

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2026-Form1CNS.pdf
  
9/8/2026 12:43 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechForm 1CNSDRAFTComposite Wisconsin Individual Income Tax Return for Nonresident Tax-Option (S) Corporation Shareholders1.0No
2026-Form4.pdf
  
9/24/2026 11:41 AMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechForm 4DRAFTWisconsin Non-Combined Corporation Franchise or Income Tax Return2.0No
2026-Form4BL.pdf
  
9/24/2026 11:41 AMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechForm 4BLDRAFTWisconsin Net Business Loss Carryforward for Separate Entity Corporations 2.0No
2026-Form4H.pdf
  
9/22/2026 3:49 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechForm 4HDRAFTWisconsin Corporation Declaration of Inactivity1.0No
2026-Form4T.pdf
  
9/22/2026 3:49 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat2026ISE-Admin-TechISE-Admin-TechForm 4TDRAFTWisconsin Exempt Organization Business Franchise or Income Tax Return1.0No
2026-Form5E.pdf
  
9/28/2026 3:06 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechForm 5EDRAFTWisconsin Election by an S Corporation Not to Be Treated as a Tax-Option Corporation 1.0No
2026-Form5R.pdf
  
9/28/2026 3:06 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechForm 5RDRAFTWisconsin Revocation of Election by an S Corporation Not to Be a Tax-Option Corporation1.0No
2026-Form5S.pdf
  
9/4/2026 4:35 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechForm 5SDRAFTWisconsin Tax-Option (S) Corporation Franchise or Income Tax Return2.0No
2026-Form9b.pdf
  
9/8/2026 12:43 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm 9bDRAFTMiscellaneous Income1.0No
2026-FormC.pdf
  
9/28/2026 3:06 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm CDRAFTWisconsin Allocation and Separate Accounting Data1.0No
2026-Form-Corp-ES-inst.pdf
  
2/6/2026 9:47 AMDuxbury, Randy P - DORForm; Form-Corp; Form-Instructions2026ISE-Admin-TechISE-Admin-TechForm Corp-ES InstructionsFINALWisconsin Corporation Estimated Tax Voucher Instructions2.0No
2026-FormFP-T.pdf
  
10/9/2026 7:40 AMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm FP-TDRAFTTransfer of Film Production Credits1.0No
2026-FormHR-T.pdf
  
2/6/2026 7:35 AMDuxbury, Randy P - DORForm; Form-Corp; Form-Fiduciary; Form-Ind-Income; Form-Partnership; Form-Flat2026ISE-Admin-TechISE-Admin-TechForm HR-TFINALTransfer of Supplement to the Federal Historic Rehabilitation Credit1.0Yes
2026-FormHR-Tf.pdf
  
2/6/2026 7:35 AMDuxbury, Randy P - DORForm; Form-Corp; Form-Fiduciary; Form-Fill-In; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm HR-T (Fill-In Form)FINALTransfer of Supplement to the Federal Historic Rehabilitation Credit Fill-In Form1.0No
2026-FormHR-T-Inst.pdf
  
2/6/2026 8:06 AMDuxbury, Randy P - DORForm-Corp; Form-Fiduciary; Form-Ind-Income; Form-Instructions; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm HR-T InstructionsFINALTransfer of Supplement to the Federal Historic Rehabilitation Credit Instructions1.0No
2026-FormPW-1.pdf
  
9/8/2026 3:23 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm PW-1DRAFTWisconsin Nonresident Income or Franchise Tax Withholding on Pass-Through Entity Income1.0No
2026-FormPW-2.pdf
  
9/8/2026 11:16 AMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm PW-2FINALWisconsin Nonresident Partner, Member, Shareholder, or Beneficiary Pass-Through Withholding Exemption Affidavit3.0No
2026-FormPW-ES-Ins.pdf
  
2/6/2026 8:06 AMDuxbury, Randy P - DORForm-Fiduciary; Form-Corp; Form-Instructions; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm PW-ES InstructionsFINALWisconsin Pass-Through Entity Withholding Payment Voucher Instructions1.0No
2026-FormPW-U.pdf
  
9/8/2026 12:43 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm PW-UDRAFTUnderpayment of Estimated Withholding Tax by Pass-Through Entities1.0No
2026-FormWQOFf.pdf
  
9/8/2026 11:53 AMGallagher, Dylan M - DORForm; Form-Corp; Form-Fill-In; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm WQOF (Fill-In Form)FINALWisconsin Qualified Opportunity Fund Certificate Fill-In Form1.0No
2026-FormW-RA.pdf
  
9/24/2026 6:34 AMSellner, Valerie A - DORForm; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Corp; Form-Partnership2026ISE-Admin-TechISE-Admin-TechForm W-RADRAFTRequired Attachments for Electronic Filing1.0No
2026-Schedule4I.pdf
  
9/22/2026 3:49 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechSchedule 4IDRAFTWisconsin Adjustments for Insurance Companies1.0No
2026-Schedule4V.pdf
  
9/22/2026 3:49 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechSchedule 4VDRAFTWisconsin Additions to Federal Income1.0No
2026-Schedule4W.pdf
  
9/22/2026 3:49 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechSchedule 4WDRAFTWisconsin Subtractions From Federal Income1.0No
2026-Schedule4Y.pdf
  
9/22/2026 3:49 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechSchedule 4YDRAFTWisconsin Subtraction Modification for Dividends1.0No
2026-Schedule5K-1.pdf
  
9/8/2026 4:22 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechSchedule 5K-1DRAFTTax-Option (S) Corporation Shareholder’s Share of Income, Deductions, Credits, etc.1.0No
2026-Schedule5S-ET.pdf
  
9/4/2026 4:35 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat2026ISE-Admin-TechISE-Admin-TechSchedule 5S-ETDRAFTEntity-Level Tax Computation2.0No
2026-ScheduleA-01.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-01DRAFTWisconsin Single Sales Factor Apportionment Data for Nonspecialized Industries1.0No
2026-ScheduleA-02.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-02DRAFTWisconsin Apportionment Percentage for Interstate Financial Institutions1.0No
2026-ScheduleA-03.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-03DRAFTWisconsin Apportionment Percentage for Interstate Motor Carriers1.0No
2026-ScheduleA-04.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-04DRAFTWisconsin Apportionment Percentage for Interstate Telecommunications Companies 1.0No
2026-ScheduleA-05.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-05DRAFTWisconsin Premiums Factor for Insurance Companies1.0No
2026-ScheduleA-06.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-06DRAFTWisconsin Receipts Factor for Interstate Brokers-Dealers, Investment Advisors, Investment Companies, and Underwriters1.0No
2026-ScheduleA-07.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-07DRAFTWisconsin Apportionment Percentage for Interstate Air Carriers1.0No
2026-ScheduleA-08.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-08DRAFTWisconsin Apportionment Percentage for Broadcasters 1.0No
2026-ScheduleA-09.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-09DRAFTWisconsin Apportionment Percentage for Interstate Railroads 1.0No
2026-ScheduleA-10.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-10DRAFTWisconsin Apportionment Percentage for Interstate Pipeline Companies1.0No
2026-ScheduleA-11.pdf
  
10/6/2026 1:44 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule A-11DRAFTWisconsin Apportionment Percentage for Interstate Air Freight Forwarders Affiliated with a Direct Air Carrier1.0No
2026-ScheduleAR.pdf
  
9/24/2026 9:56 AMSellner, Valerie A - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule ARDRAFTExplanation of Amended Return1.0No
2026-ScheduleBD.pdf
  
10/6/2026 2:48 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule BDDRAFTBusiness Development Credit1.0No
2026-ScheduleET-OS.pdf
  
9/8/2026 12:43 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule ET-OSDRAFTCredit for Net Tax Paid to Another State1.0No
2026-ScheduleFC.pdf
  
8/17/2026 1:15 PMSellner, Valerie A - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income2026ISE-Admin-TechISE-Admin-TechSchedule FCDRAFTFarmland Preservation Credit1.0No
2026-ScheduleFC-A.pdf
  
8/17/2026 1:16 PMSellner, Valerie A - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income2026ISE-Admin-TechISE-Admin-TechSchedule FC-ADRAFTFarmland Preservation Credit1.0No
2026-ScheduleFP.pdf
  
10/9/2026 7:09 AMSellner, Valerie A - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule FPDRAFTFilm Production Services and Company Investment Credits2.0No
2026-ScheduleHR.pdf
  
9/29/2026 3:04 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule HRFINALWisconsin Historic Rehabilitation Credits3.0Yes
2026-ScheduleHR-5.pdf
  
2/6/2026 8:06 AMDuxbury, Randy P - DORForm; Form-Corp; Form-Flat; Form-Ind-Income; Form-Partnership; Form-Fiduciary2026ISE-Admin-TechISE-Admin-TechSchedule HR-5FINALWisconsin Supplement to the Federal Historic Rehabilitation Tax Credit – Five-Year Credit Claim1.0Yes
2026-ScheduleHR-5f.pdf
  
2/6/2026 8:07 AMDuxbury, Randy P - DORForm; Form-Corp; Form-Fiduciary; Form-Fill-In; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule HR-5 (Fill-In Form)FINALWisconsin Supplement to the Federal Historic Rehabilitation Tax Credit – Five-Year Credit Claim Fill-In Form1.0No
2026-ScheduleHR-5-Inst.pdf
  
2/6/2026 8:07 AMDuxbury, Randy P - DORForm-Corp; Form-Fiduciary; Form-Ind-Income; Form-Instructions; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule HR-5 InstructionsFINALWisconsin Supplement to the Federal Historic Rehabilitation Tax Credit - Five-Year Credit Claim Instructions1.0No
2026-ScheduleHRf.pdf
  
9/29/2026 3:02 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fill-In; Form-Fiduciary; Form-Partnership; Form-Ind-Income2026ISE-Admin-TechISE-Admin-TechSchedule HR (Fill-In Form)FINALWisconsin Historic Rehabilitation Credits Fill-In Form3.0No
2026-ScheduleHR-Inst.pdf
  
9/29/2026 2:57 PMGallagher, Dylan M - DORForm-Corp; Form-Fiduciary; Form-Ind-Income; Form-Instructions; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule HR InstructionsFINALWisconsin Historic Rehabilitation Credits Instructions2.0No
2026-ScheduleR.pdf
  
8/13/2026 1:51 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat; Form-Fiduciary; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule RDRAFTWisconsin Research Credits2.0No
2026-ScheduleRR.pdf
  
10/8/2026 3:47 PMGallagher, Dylan M - DORForm; Form-Corp; Form-Fiduciary; Form-Flat; Form-Ind-Income; Form-Partnership2026ISE-Admin-TechISE-Admin-TechSchedule RRDRAFTRail Infrastructure Modernization and Maintenance Credit1.0No
2026-ScheduleWI-8882.pdf
  
8/25/2026 10:43 AMGallagher, Dylan M - DORForm; Form-Corp; Form-Flat; Form-Ind-Income; Form-Partnership; Form-Fiduciary2026ISE-Admin-TechISE-Admin-TechSchedule WI-8882DRAFTAdditional Employer-Provided Child Care Credit2.0No
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