The web Browser you are currently using is unsupported, and some features of this site may not work as intended. Please update to a modern browser such as Chrome, Firefox or Edge to experience all features Michigan.gov has to offer.
Software Developer Website for Substitute Forms and Electronic Filing
Michigan Treasury Updates
MICHIGAN Letter of Intent to Participate in E-File and Substitute Forms Programs (Form 4430) is available for here for submission. Developers must submit Form 4430 to Treasury to obtain access to the State Exchange System. Form 4430 can be submitted to MIFormsEfile@michigan.gov
NOTE: If your business/organization supports ONLY Personal Property Tax forms, you do NOT need to submit Form 4430. The most recent version of the Personal Property Tax forms are on Treasury’s Web site.
Once your company’s 4430 is processed, your company will receive an e-mail from Support@taxadmin.org which will provide you access to the approved folder(s) with the State Exchange System site.
Michigan Department of Treasury will post all e-file and form information to the State Exchange Site.
Software developers should reference the Substitute Forms Submissions Manual for guidelines on submitting substitute forms. Software developers are not to submit forms for testing until forms are posted as “Final Drafts.”