Illinois State Income Tax
General administration:
Department of Revenue
101 West Jefferson Street
Springfield, IL 62702
217-782-3336
Register new businesses by filing Form REG -1 (Business Registration Application):
Department of Revenue
Central Registration Division
PO Box 19030
Springfield, IL 62794-9030
217-785-3707
https://www.revenue.state.il.us/app/ibri/
Register for electronic funds transfer (required if average monthly withholding liability in previous year in excess of $50,000) by filing Authorization Agreement for Electronic Funds Transfer (EFT):
Department of Revenue
PO Box 19015
Springfield, IL 62794-9015
Fax 217-524-4772
Deposit withholdings using Form IL-501 (Employer's Withholding Tax Payment Form).
Report quarterly withholdings by filing Form IL-941 (Employer's Quarterly Withholding Tax Return) by last day of month following end of quarter:
Department of Revenue
PO Box 19447
Springfield, IL 62794-9447
217-782-3336
Furnish annual summary statements of wages paid and taxes withheld to employees on Form W-2 (Wage and Tax Statement) by January 31 and to state on Form IL-W-3 (Reconciliation of Income Tax Withheld) by last day of February;
Report annual non-employee compensation in excess of $1,000 by filing Form IL-1096 (Annual Summary and Transmittal of US Information Returns 1099 for Rents and Royalties Only) or Form IL-1096-P (Annual Summary and Transmittal of US Information Returns 1099 for Personal Service Contracts and Prizes and Awards) by March 15 and Forms 1099 by January 31:
Department of Revenue
PO Box 19024
Springfield, IL 62794-9024
217-782-3336
