Substitute Forms Developers

FY 2018-29 - Illinois Income Tax Guidance - Changes for Business Income Tax - 06/21/2018

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

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. Account access to the draft forms area will reset the end of September.

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