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Illinois Department of Revenue Contact Information
Need to reach the Illinois Department of Revenue? Here are all the ways to get help.
Main Contact Information
| General Information | 800-732-8866 |
| Springfield Office | 217-782-3336 |
| Hours | Monday – Friday, 8:00 AM – 5:00 PM (Central) |
| Website | tax.illinois.gov |
Mailing Address
Illinois Department of Revenue
PO Box 19001
Springfield, IL 62794-9001
Regional Offices
Chicago: James R. Thompson Center, 100 W. Randolph Street, Concourse Level, Chicago, IL 60601
Springfield: Willard Ice Building, 101 W. Jefferson Street, Springfield, IL 62702
Online Services Available
- Register for sales tax via MyTax Illinois
- File and pay sales tax returns
- Update business information
- View account history
Forms and Publications
- REG-1: Illinois Business Registration Application
- ST-1: Sales and Use Tax Return
- CRT-61: Certificate of Resale
Access at: tax.illinois.gov/forms
Related Illinois Guides
Rates and Fees – Current Illinois sales tax rates.
Business Licensing – Other licenses your business may need.