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Scam Alert: Fake Texts and Websites Impersonating IDOR

Be alert for fraudulent messages or websites attempting to steal your banking information, login credentials, or credit card details. The Illinois Department of Revenue (IDOR) will never request personal or financial information via text message. To confirm official communications or contact details, always visit https://tax.illinois.gov.

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What do I have to do to get an extension for business income tax?

We grant an automatic extension of time to file your business tax return based on the return type and due date. This extension does not grant you an extension of time to pay any tax you owe. If you determine that you will owe tax, you must pay any tax you owe to avoid penalty and interest on tax not paid by the original due date of your return. We encourage you to pay electronically. 

Form
Return Type
Payment Voucher
IL-1120
Corporation Income and Replacement Tax
IL-1120-V
IL-1120-ST
Small Business Corporation Replacement Tax
IL-1120-ST-V
IL-1065
Partnership Replacement Tax
IL-1065-V
IL-1041
Fiduciary Income and Replacement Tax
IL-1041-V
IL-990-T
Exempt Organization Income and Replacement Tax
IL-990-T-V

 

Other Related 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.