Illinois S-Corporations Form Availability (print only)
Form IL-2220, Computation of Penalties
01/30/2026
Schedule M, Other Additions and Subtractions, page 1
01/30/2026
Form IL-4562, Special Depreciation
01/30/2026
Schedule B, Shareholders' Identification
01/30/2026
Schedule 1299-A, pg3, Tax Subtractions and Credits
01/30/2026
Form IL-477, Replacement Tax Investment Credits
01/30/2026
IL-1120-ST pg 1, Illinois Small Bus Corp Replacement Tax Return
01/30/2026
Form IL IL-1120-ST, Small Bus Corp Replacement Tax Return
01/30/2026
IL-1120-ST pg 2, Illinois Small Bus Corp Replacement Tax Return
01/30/2026
Illinois Net Loss Deduction
01/30/2026
Schedule M, Other Additions and Subtractions, page 2
01/30/2026
Schedule NB, Non-Business Income
01/30/2026
Schedule K-1-T Received
01/30/2026
Form IL-2220,p3, Computation of Penalties
01/30/2026
Schedule 1299-A, Tax Subtractions and Credits
01/30/2026
Schedule K-1-P Received
01/30/2026
Payment Voucher 1-4 - 1120 S-T-V
01/30/2026
Payment Voucher 1-4 - 1120 S-T-V
01/30/2026
Payment Voucher 1-4 - 1120 S-T-V
01/30/2026
Payment Voucher 1-4 - 1120 S-T-V
01/30/2026
Schedule K-1-P, Shareholder's Share of Inc, Ded, etc.
01/30/2026
IL-1120-ST-X, Amended Return, Page 2
01/30/2026
IL-1120-ST-X, Amended Return, Page 1
01/30/2026
Form IL-1000-E, Certificate of Exmpt for Pass-through Entity Pmnts
01/30/2026
Schedule K-1-P(3), Pass-through Withholding Calculation for Nonresid
01/30/2026
Form IL-1120ST-V, Payment Voucher for Small Business Corporations
01/30/2026