Agencies
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Business Income Tax Forms
Corporation Income and Replacement 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 and Unemployment Forms
- Withholding Tax (Payroll) - IL-941
- Illinois Department of Employment Security Forms (Unemployment)