Illinois Department of Revenue

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Important Notices

Have you received a letter or Final Notice of Tax Due assessing an Estimated Payment Penalty?

Learn why you received this letter from IDOR by visiting our webpage Letters and Notices for Individual Income Tax (illinois.gov).

Response Options for Identity Verification Letters

If you received an identity verification letter from the Illinois Department of Revenue, you can respond electronically by selecting the option that matches your letter: enter a code, take a quiz, or attach documents. No MyTax Illinois account is required. For more information, see Identity Verification Letters Information.

Information For

Local Governments

Tax Professionals

Featured Programs

Where’s My Refund?

Check your refund status

IDOR's free online account management program File, pay, register, and more

Earned Income Tax Credit (EITC)

This program provides benefits for working people with low to moderate income

Fraud Prevention and Reporting

Reporting and Preventing Identity Theft and Additional Information and Resources

Volunteer Emergency Worker Tax Credit

Information and resources for the Volunteer Emergency Worker Tax Credit

Tax Lien Registry

Search for tax liens filed by the Illinois Department of Revenue

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