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Software Developer Secure Web Site for Substitute Forms and Electronic Filing

Important Information for Software Developers

As part of a Michigan Department of Treasury reorganization, the Forms and Document Services and Electronic Filing Programs areas have been merged to form the new Forms, Documentation and E-file Services (FDES) group. This consolidation will enable Treasury to provide improved services to the software developer community. Some of the benefits are:

  • A unified e-mail box ( and contact phone number (517-636-4450) offering a central point of contact for developer issues and inquiries.
  • Bringing forms and e-file staff together, improving internal Treasury communications and allowing us to streamline our processes.
  • A renewed focus on customer service and operational efficiency in the substitute forms and e-file approval process.

We look forward to working more closely with each other and with our developers in the coming 2014 testing season. We trust that FDES will set a new standard for Treasury's service to software developers. If you have any questions, concerns, or comments, please don't hesitate to contact us at the e-mail address or phone number listed above. We want to hear from you!

Best wishes for a successful tax season!


All software developers that anticipate producing Michigan Department of Treasury (Treasury) computer-generated forms and/or tax preparation software must complete Form 4430, Michigan Letter of Intent to Participate in E-File and Substitute Forms Programs. Once processing is complete, you will receive an e-mail confirmation. If, after 3 days, you have not received the confirmation, call 517-636-4450 for assistance.

E-mail questions to

Select a link below to access the secure Web site.
Treasury reserves the right to revoke access for misuse of this site or noncompliance with stated requirements.
2014 Tax Year
Substitute Forms and Electronic Filing Information
Individual Income Tax Michigan Business Tax
Corporate Income Tax Sales, Use and Withholding Taxes
Fiduciary Tax Flow-Through Withholding Tax
(all forms without a scan line or Doc ID code)
Miscellaneous Forms Process
Scan Line Specifications and Form Samples
Vouchers with Scanlines
2015 Tax Year
Substitute Forms and Electronic Filing Information
Sales, Use and Withholding Taxes

Letter For PSPs and TPAs
Return Submission Flow