Substitute Forms Developers

Creating your own version of Illinois Department of Revenue tax forms?

New 2021 Guidelines for Substitute Tax Forms (Form IL-8633-SF)- Technical specifications, enrollment form, and testing requirements.
Draft Forms (Password protected area) - Enrollment as a substitute forms developer is required. See the Guidelines for Substitute Tax Forms for more information on how to access this page. Note: This page is being updated for the 2021 tax year. For access, you must complete an annual enrollment form, Form IL-8633-SF.
Illinois Public Account Maintenance

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.

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Substitute Forms Developers