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About IDOR

Tax Professionals

Electronic Transmitters/Software and Forms Developers

Electronic Transmitters/Software Developers

Filing Specifications

Electronic Transmitter Information for Excise, Sales & Use, and Withholding Taxes

NOTE: If your electronic filing software produces printed forms, you must separately enroll and test printed forms. See Substitute Forms Developers on the right.

Substitute Forms Developers

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

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 on the left.

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