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Tax Assistance

 

The Illinois Department of Revenue (IDOR) provides a variety of services designed to help you solve problems that you may encounter when you complete your tax return, respond to a notice, or determine your account's current status.

Web site

The department's web site, www.ILtax.com provides electronic filing, tax publications, a legal research page, forms, and many other useful resources. You may also e-mail the department with questions, comments, or suggestions.

Phone

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. You can also contact the department through the toll-free taxpayer assistance line at 1-800-732-8866 or 217-782-3336.

Walk in

When you come to one of the department's facilities, bring all available information with you. No appointments are necessary; however, if you have a complex issue, please contact the department ahead of time so they can be prepared to give you the help you may need.