Illinois Corporations Form Availability (print only)
Form IL-2220, Computation of Penalties
01/30/2026
Form IL-4562, Special Depreciation
01/30/2026
Schedule 1299-D, Income Tax Credits
01/30/2026
Schedule 1299-B, Enterprise Zone and Foreign Trade Zone/Sub-Zone Subtractions
01/30/2026
Schedule NB, Nonbusiness Income
01/30/2026
Form IL-1120, Corporation Inc and Replacement Tax Return
01/30/2026
Schedule M, Other Additions and Subtractions
01/30/2026
Form IL-477, Replacement Tax Investment Credits
01/30/2026
Illinois Net Loss Deduction
01/30/2026
Schedule J, Foreign Dividends
01/30/2026
Form IL-1120-ES, Estimated Inc and Replacement Tax Payments
01/30/2026
Amended Corp Inc & Replacement Tax Ret
01/30/2026
Form IL-1120-V, Payment Voucher for Corporations
01/30/2026