Contact Department of Revenue
If you need assistance, please log into your Taxpayer Portal Profile, and Submit a General Inquiry Service Request.
If you do not have a Portal Profile, email us at revenuecompliance@cookcountyil.gov or call 312-603-6961.
Contact Us
Cook County Department of Revenue
118 N Clark Street Room 1160
Chicago, IL 60602
Email Business Tax Inquiries to: revenuecompliance@cookcountyil.gov
Email Individual Use Tax Inquiries to: IUT@cookcountyil.gov
Email Unincorporated Cook County Wheel Tax: wheel.tax@cookcountyil.gov
Telephone: 312-603-6961