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2022 Corporate Income Tax Forms

Name Description
IL-1120

Instructions

02/14/2023 - Updated to reflect the credit changes adopted by PA 102-1125

 Corporation Income and Replacement Tax Return
2022-IL-1120-V  

Payment Voucher for 2022 Corporation Income and Replacement Tax (Use this voucher and Appendix A of Form IL-1120 Instructions to make a 2022 return or extension  payment)
​2023-IL-1120-V ​ Payment Voucher for 2023 Corporation Income and Replacement Tax (Use this voucher and Appendix B of Form IL-1120 Instructions to make 2023 estimated payments)
​IL-1120-X
 ​Instructions
 Amended Corporation Income and Replacement Tax Return
IL-1120-X-V   Payment Voucher for Amended Corporation Income and Replacement Tax
IL-477 Instructions Replacement Tax Investment Credits
IL-2220

Instructions

03/08/2023 - Updated to clear up
discrepancies between this form
and return instructions about
when estimated tax penalties are
due for partnerships or S-corporations
electing to pay PTE tax.

 Computation of Penalties for Businesses
IL-4562

Instructions

03/13/2023 - Updated to clarify how bonus depreciation on luxury automobiles is handled for Illinois filing.

02/17/2023 - Updated to add date references on the Line 10 specific instructions.

 Special Depreciation
Schedule INL Instructions Illinois Net Loss Adjustments for Cooperatives and REMIC Owners
Schedule INS Instructions Tax for Foreign Insurers
Schedule J Instructions Foreign Dividends
Schedule M Instructions Other Additions and Subtractions (for businesses)
Schedule NB Instructions Nonbusiness Income
Schedule NLD Instructions Illinois Net Loss Deduction
Schedule UB Instructions Combined Apportionment for Unitary Business Group
Schedule UB/INS Instructions Tax for a Unitary Business Group with Foreign Insurer Members
Schedule UB/NLD Instructions Unitary Illinois Net Loss Deduction
Schedule 80/20 Instructions Related-Party Expenses
Schedule 1299-B Instructions

 River Edge Redevelopment Zone or Foreign Trade Zone (or sub-zone) Subtractions (for corporations and fiduciaries)
Schedule 1299-D

Instructions

02/14/2023 - Updated to reflect the credit changes adopted by PA 102-1125

 Income Tax Credits (for corporations and fiduciaries)

Schedule 1299-I

02/14/2023 - Updated to reflect the credit changes adopted by PA 102-1125

   Income Tax Credits Information and Worksheets
Schedule 4255

Instructions

02/14/2023 - Updated to reflect the credit changes adopted by PA 102-1125

  
Subgroup Schedule (UB) Instructions
 Subgroup Schedule