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Scam Alert: Fake Texts and Websites Impersonating IDOR

Be alert for fraudulent messages or websites attempting to steal your banking information, login credentials, or credit card details. The Illinois Department of Revenue (IDOR) will never request personal or financial information via text message. To confirm official communications or contact details, always visit https://tax.illinois.gov.

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2011 and Prior Years Withholding Tax Forms (Payroll)

Name Description  
IL-941 Illinois Withholding Income Tax Return and Instructions
Note to Annual Filers: IL-941-A is obsolete, use IL-941 to file your annual return.
IL-941-X Amended Illinois Withholding Tax Return
Note to Annual Filers: IL-941-A-X is obsolete, use IL-941-X to amend a previously filed IL-941-A.
UI-WIT-X Amended Illinois Income Tax Withholding Return for Household Employers
Note: For tax years on or before 2010. Beginning with 2011, file your household withholding tax on your IL-1040. Click here for more information.