Illinois Department of Revenue
Tax Forms

Business Tax Forms


Corporate Income Tax - IL-1120

Exempt Organization Income and Replacement Tax - IL-990-T

Fiduciary Income and Replacement Tax - IL-1041

Partnership Replacement Tax - IL-1065

Small Business Corporation Replacement Tax - IL-1120-ST

Withholding Tax (Payroll) - IL-941

Illinois Department of Employment Security Forms (Unemployment)

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