Contact Us
Help with Tax Questions
Find answers to your frequently asked tax questions with
our Taxpayer
Answer Center.
- Select a category
- Type in keyword(s) or phrase
You must first complete a search to have the option of sending an email. Once you have completed a search and are unable to find an answer, the "Send an Email" tab will appear.
Telephone Assistance
To receive assistance by phone, please call 1 800 732-8866 or 1 217
782-3336. Representatives are available Monday through Friday, 8 am
- 5 pm. Our TDD (telecommunication device for the deaf) number is 1 800 544-5304.
IDOR also has a Business Hot Line that helps meet the needs of businesses and tax professionals. The Business Hot Line is available at 1 217 524-4772, Monday through Friday, 8 am - 5 pm.
Other Department Phone Numbers
IDOR also has a Business Hot Line that helps meet the needs of businesses and tax professionals. The Business Hot Line is available at 1 217 524-4772, Monday through Friday, 8 am - 5 pm.
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
Regional Office Locations & Contact Information
