Skip to main content

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.

Employment Sign Up for Updates

Aviation Fuel Sales and Use Tax Filing

Use MyTax Illinois to electronically file Form ST-70, Aviation Fuel Sales and Use Tax Return, and Form ST-70-X, Amended Aviation Fuel Sales and Use Tax Return. These forms are not available for download.

Form Description   
ST-70-C Sustainable Aviation Fuel Purchase Credit Certification - (N-06/23)
ST-70-PROD Producer Certification of Sustainable Aviation Fuel (SAF) - (N-06/23)
ST-70 Instr. Aviation Fuel Sales and Use Tax Return Instructions Note: For reporting periods July 2023 and after. (R-11/24)  - HTML
ST-70-X Instr. Amended Aviation Fuel Sales and Use Tax Return Instructions Note: For reporting periods July 2023 and after. (R-11/24) - HTML
ST-71 Instr. Multiple Site Form Instructions Note: For reporting periods January 2021 and after. (R-06/20)
ST-72-Instr. Sustainable Aviation Fuel Purchase Credit Form Note: For reporting periods July 2023 and after. (N-07/23)
ST-70 Instr. Aviation Fuel Sales and Use Tax Return Instructions Note: For reporting periods January 2021 through June 2023. (R-06/20)
ST-70-X Instr. Amended Aviation Fuel Sales and Use Tax Return Instructions Note: For reporting periods January 2021 through June 2023. (R-06/20)