Illinois Department of Revenue

Committed to excellence and working together to fund Illinois' future

Important Notices

Chicago IDOR Office Closed – June 18, 2025

The Illinois Department of Revenue’s Chicago Office, located at 555 W. Monroe Street, will be closed on Wednesday, June 18, 2025, due to an electrical failure. Individuals needing assistance may contact our Taxpayer Assistance Division at 1 800 732-8866 or visit an alternate Illinois Department of Revenue office.

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

Featured Programs

Where’s My Refund?

Check your refund status

MyTax Illinois

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 about the credit and application link

Tax Lien Registry

Search for tax liens filed by the Illinois Department of Revenue

More Programs

Latest News

FY 2025-27, Tobacco Retailer License Fee Increases, Effective July 1, 2025

News - Wednesday, June 18, 2025

Effective July 1, 2025, Public Act (P.A.) 104-0006 increases the annual Tobacco Retailer License fee for retailers of tobacco products.
FY 2025-26, Telecommunications Excise Tax Rate Change, Effective July 1, 2025

News - Tuesday, June 17, 2025

Effective July 1, 2025, the state Telecommunications Excise Tax rate increases from 7 percent to 8.65 percent. The increase is designated to support the state 9-8-8 Suicide and Crisis Lifeline. See 35 ILCS 630/3(c) and 4(c), as amended by P.A. 104-0006.
Open Meetings: County Official Compensation Task Force

News - Monday, June 16, 2025

Upcoming County Official Compensation Task Force meeting information
IDOR Tax Education Webinar Series - Audit & Informal Conference Board Updates

News - Friday, June 13, 2025

Please join us for our Tax Education Webinar - Audit and Informal Conference Board Updates on Friday, June 27, 2025 at 9:00 a.m. to 10:30 a.m.
IDOR Offers Guidance on Amending State Tax Returns

News - Tuesday, June 03, 2025

The Illinois Department of Revenue (IDOR) is reminding taxpayers that if they discover an error on a previously filed state income tax return—such as a miscalculation, a missed deduction, or unreported income—they are required to file an amended return to correct the mistake.
2024 Cook County Final Multiplier Announced

News - Thursday, May 29, 2025

A final 2024 property tax equalization factor of 3.0355 for Cook County was announced today by the Illinois Department of Revenue.
FY 2025-25, Sales Tax Rate Change Summary, Effective July 1, 2025

News - Friday, May 23, 2025

This informational bulletin provides information on certain taxing jurisdictions have imposed a local sales tax or changed their local sales tax rate on general merchandise sales.
IDOR Awarded 2025 Bell Seal Award for Workplace Mental Health

News - Tuesday, May 20, 2025

The Illinois Department of Revenue has received the 2025 Bell Seal for Workplace Mental Health from Mental Health America, recognizing its commitment to fostering mentally healthy workplaces.
FY 2025-24, Summary of Sales Tax Rate Changes for Aviation Fuel, Effective July 1, 2025

News - Monday, May 19, 2025

This informational bulletin provides a list of the changes in local sales tax rates on aviation fuel that take effect in certain taxing jurisdictions on July 1, 2025, due to the certification requirement.
FY 2025-23, Change in the Motor Fuel Tax Rate, Effective July 1, 2025, through June 30, 2026

News - Monday, May 12, 2025

Section 2 of the Motor Fuel Tax Law (35 ILCS 505/2) imposes a tax per gallon on all motor fuel (i.e., diesel fuel, gasoline, gasohol, liquefied petroleum gas (LPG, commonly known as “propane”), compressed natural gas (CNG), and liquefied natural gas (LNG)) used in motor vehicles operating on Illinois public highways and in recreational type watercraft operating on Illinois waters. The Law provides that the rate of tax will be increased annually on July 1 of each year by an amount equal to the percentage increase, if any, in the Consumer Price Index for All Urban Consumers for all items published by the United States Department of Labor for the 12 months ending in March of each year, rounded to the nearest one-tenth of one cent. The percentage increase for July 1, 2025, is 2.82% (.0282).