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 (This page will be available on September 15, 2023) - Enrollment as a substitute forms developer is required. See the Guidelines for Substitute Tax Forms for more information on how to access this page.