Follow the instructions provided in your notice. Generally, there is a timeframe specified in the notice for your response.
For more information about individual income tax notices, see letters and notices.
If you received an identity verification letter, instructions are available on the Identity Verification Letters Information webpage.
Other Related FAQs/Links
You may access additional information by searching the entire Illinois Department of Revenue website.
If you have additional inquiries, you may submit them on the Questions, Comments, or Requests form.