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IDOR News & Updates - April 15, 2026

It's Tax Day! Here's what you need to know

Today is the big day — your Illinois individual income tax return and payment are due! If you’re not able to file today or need quick help, no need to stress. Here are some helpful tips and tools to get you through the last‑minute rush.

Free Filing with MyTax Illinois

MyTax Illinois is IDOR’s free online filing system that makes filing simple and accurate. With or without an account, taxpayers can:

• File returns through a guided Q&A process
• Make payments
• Respond to department inquiries
• Check refund status via Where’s My Refund?
• Look up IL-PINs, estimated tax payments, and Form 1099-G information

Visit MyTax Illinois to get started. 

What should I do if I cannot file today? 

The state of Illinois automatically grants a six-month extension to file your Illinois individual income tax return (Form IL-1040).

For calendar year filers, the extended due date is October 15.

If you receive a federal extension of more than six months, you will automatically receive the same extension for your Illinois return.

Note: An extension of time to file does not extend the amount of time you have to pay any tax owed.

What should I do if I owe taxes? 

If you find that you owe taxes, it is essential to pay the amount due by April 15, 2026, to reduce or avoid any penalties or interest. 

If you are unable to file your individual income tax return and owe taxes, pay your tax by paper check using Form IL-505-I, Automatic Extension Payment for Individuals  or with any of our electronic payment options.

What are my payment options? 

• MyTax Illinois is an easy way to pay your IL-505-I payment. First time filers may not use MyTax Illinois to make a payment. Please use one of the other methods listed. 
• Credit Card (MasterCard, Discover, American Express, or Visa)
• Paper Check or Money Order (via mail)

What if I need tax assistance? 

If you have any last minute questions about your IL-1040 Individual Income Tax Return, or other tax-related topics, give us a call. Our staff will be available until 7:00 PM tonight.

• 1 800 732-8866 or 217 782-3336
• 1 800 544-5304 TTY

Over-the-phone translation services are available.

Where's My Refund?

If you e-filed your individual income tax return, you can check the status of your refund by using Where's My Refund, available at tax.illinois.gov. 

Just provide your Social Security number and exact amount of your refund to check your status. 

Where's My Refund is updated each business day, so please allow 24-48 hours between inquiries. 

If your refund has been processed

Check the Illinois Comptroller's Find Your Illinois Tax Refund to see when you can expect payment.

Resources

For the most up-to-date information, printable forms, schedules, and instructions for the 2025 tax year, please visit IDOR’s website at: tax.illinois.gov