Federal Income Tax Information | ILLINOIS DEPARTMENT OF REVENUE - Taxpayer Assistance Services
555 West Monroe Street, Chicago, IL 60661
Eligibility
Open to all
Hours
Service Hours
Monday: 8:00 AM - 5:00 PM
Tuesday: 8:00 AM - 5:00 PM
Wednesday: 8:00 AM - 5:00 PM
Thursday: 8:00 AM - 5:00 PM
Friday: 8:00 AM - 5:00 PM
800-732-8866
Voice·
Primary Program Phone
217-782-3336
Voice·
Alternate Program Phone
Websitehttps://tax.illinois.gov
Languages
Interpreter services available
Application process
Call for assistance
Documents Required: None
Fees
No fee
Service area
Lake County, IL
Online resource that helps taxpayers understand and meet tax responsibilities. Also offers hotline for tax questions.
Date of Last Formal Update
04/17/2026
Data provided by
Lake County 211
What's Here
Providing organization
INTERNAL REVENUE SERVICE IRS
Government organization overseeing federal taxes.