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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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Tax-Prep Software for Business Income Tax (BIT) Filers

Participation in the Illinois Electronic Filing Program for Business Income Tax returns is available to software developers, transmitters, Electronic Return Originators (EROs), and taxpayers. To use this method of filing, you can write your own software or buy software from an accepted electronic filer (third party).

If you wish to create your own software for filing or create software to sell, please refer to the BTR-36, Implementation Guide for Business Income Tax Federal/State Electronic Filing Program. To enroll, complete the Business Electronic Filing Enrollment Application located on MyDevPortal.

Note: Some taxpayers are required to pay their tax electronically using Electronic Funds Transfer.