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Substitute Forms Developers
Creating your own version of Illinois Department of Revenue tax forms?
- 2023 Guidelines for Substitute Tax Forms (Form IL-8633-SF)- Technical specifications, enrollment form, and testing requirements. New Guidelines and Enrollment for 2023 tax year is now available.
- Draft Forms - Complete and submit Form IL-8633-SF to access this page.
NOTE: If your substitute forms print from electronic filing software you develop, you must separately enroll and test your software. See Electronic Transmitters/Software Developers.