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
Because the IRS processes the first return it receives, if another person claims your dependent first, the IRS will reject your return. The IRS won’t tell you who claimed your dependent. But if you don’t suspect anyone who could have claimed the dependent, your dependent may be a victim of tax identity theft. You’ll need to take some steps to protect your right to claim the dependent and your refund if you don’t think that the other person was eligible to claim your dependent. First, double check that you meet all of the requirements to claim the dependent.
The IRS may delay your refund while the IRS looks into the issue, but you should still receive your refund. File a paper return. Note that when you file a paper return, it can take six to eight weeks for the IRS to process. This includes things like birth certificates and proof of identity, but also documents that show that your dependent lived with you at the same address for more than half of the year. This doesn’t mean that you can’t correct the situation. Don’t panic. The most important thing to remember is to prove with proper documentation that you are entitled to claim the dependent. Document your case as the IRS rules for claiming a dependent can get complicated.