Illinois Tax Office Phone Numbers and Information

Illinois Tax Office Telephone Assistance
To receive assistance by phone, please call 800 732-8866 or 217 782-3336. Representatives are available Monday through Friday, 8 am – 5 pm. Our TDD (telecommunication device for the deaf) number is 800 544-5304.

IDOR also has a Business Hot Line that helps meet the needs of businesses and tax professionals. The Business Hot Line is available at 217 524-4772, Monday through Friday, 8 am – 5 pm.

Alcohol, Tobacco, & Fuel Division
217 785-2645

Legislative Office
217 785-5918

Bingo and Charitable Games Office
(application and registration only)
217 785-5864

Problems Resolution Division
217 785-7313

Board of Appeals
312 814-3004

Sales Tax (specific account inquiries only)
217 782-7897

Business Hot Line
217 524-4772

Tax Fraud Hot Line
800 243-2811

Central Registration Division
217 785-3707

Taxpayer Assistance Lines
800 732-8866
217 782-3336

Forms Order Line
800 356-6302

TDD (Telecommunications Device for the Deaf)
800 544-5304

Freedom of Information Office
217 782-0985

Legal Services Office
217 782-7054