2021 Corporate Income Tax Forms

NameDescription
IL-1120 Instructions
 03/14/2022
Lines 51 and 54 line 
references to
Schedule UB/INS
were updated.
Corporation Income and Replacement Tax Return
2021-IL-1120-V  

Payment Voucher for 2021 Corporation Income and Replacement Tax (Use this voucher and Appendix A of Form IL-1120 Instructions to make a 2021 return or extension  payment)

2022-IL-1120-VPayment Voucher for 2022 Corporation Income and Replacement Tax (Use this voucher and Appendix B of Form IL-1120 Instructions to make 2022 estimated payments)
​IL-1120-X
Instructions
Updated 04/20/2022
Lines 51 and 54 line
 references to
Schedule UB/INS
were updated. 
Line 66 line reference
to IL-1120, Step 8 
was updated. 
Step 1, Line C had 
extra words removed.
​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
03/29/2022
Lines 6 and 13
updated to include
PTE tax credit 
received. 
Computation of Penalties for Businesses
IL-4562
Instructions
06/09/2022
updated Line 3
to remove 40%
from 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 UB Instructions Combined Apportionment for Unitary Business Group
Schedule UB/INS Instructions Tax for a Unitary Business Group with Foreign Insurer Members
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
05/31/2022
updated to
incorporate the
Agritourism
Liability Insurance
credit effective for
tax years beginning
on or after
 January 1, 2022
Income Tax Credits (for corporations and fiduciaries)
​Schedule 1299-I
05/31/2022
updated to
incorporate the
Agritourism
Liability Insurance
credit effective for
tax years beginning
on or after
January 1, 2022
​Income Tax Credits Information and Worksheets
Schedule 4255 Instructions
03/24/2022
Update IL-990-T line
references on Line 18
and 21 instructions.
Recapture of Investment Tax Credits
Subgroup Schedule (UB) Instructions
Subgroup Schedule