2020 Small Business Corporation Replacement Tax Forms

NameDescription
IL-1120-ST Instructions Small Business Corporation Replacement Tax Return (includes Schedule B)
2020-IL-1120-ST-V  Payment Voucher for 2020 Small Business Corporation Replacement Tax (Use this voucher and Appendix A of Form IL-1120-ST Instructions to make a 2020 extension payment.)
​2021-IL-1120-ST-V

​Payment Voucher for 2021 Small Business Corporation Replacement Tax (Use this voucher and Appendix B of Form IL-1120-ST Instructions to make voluntary prepayment(s) of 2021 tax due.) 
IL-1120-ST-X
Instructions​Amended Small Business Corporation Replacement Tax Return (includes Schedule B)
IL-1120-ST-X-V  Payment Voucher for Amended Small Business Corporation Replacement Tax
IL-477 Instructions Replacement Tax Investment Credits
IL-1000-E  Certificate of Exemption for Pass-through Withholding Payments
IL-4562
Instructions Special Depreciation
Schedule F Instructions Gains from Sales or Exchanges of Property Acquired Before August 1, 1969
Schedule K-1-P  Partner's or Shareholder's Share of Income, Deductions, Credits, and Recapture
  Schedule K-1-P (1) Instructions for Partnerships and S Corporations Completing Schedule K-1-P and Schedule K-1-P(3)
  Schedule K-1-P (2) Partner's and Shareholder's Instructions
Schedule K-1-P (3)  Pass-through Withholding Calculation for Nonresident Members
Schedule M Instructions Other Additions and Subtractions (for businesses) 
Schedule NB Instructions Nonbusiness Income
Schedule UB Instructions Combined Apportionment for Unitary Business Group
Schedule 80/20 Instructions Related-Party Expenses
Schedule 1299-A Instructions Tax Subtractions and Credits (for partnerships and S corporations)
​Schedule 1299-I
​Income Tax Credits Information and Worksheets
Schedule 4255 Instructions Recapture of Investment Tax Credits
Subgroup Schedule (UB) Instructions Subgroup Schedule