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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
How do I get a copy of my 2018 form 1040?