Contact Us

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Help with Tax Questions

Find answers to your frequently asked tax questions with our Taxpayer Answer Center.

  • Ask a question in the search box
  • Narrow your search by choosing a support category

If the Taxpayer Answer Center does not contain the answer you are looking for, you may contact our support representatives by clicking on the Questions, Comments, or Requests link at the bottom of every answer page.

Click here to access the Taxpayer Answer Center.

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.

Other Department Phone Numbers

Visit a Local Office

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.

Regional Office Locations & Contact Information

Website Feedback

If you are having difficulty with this website or have a suggestion for how to make the site better, you can  Email the Webmaster.

Other IDOR Information