Software Developer Secure Web Site for Substitute Forms and Electronic Filing

What's New

City of Detroit Corporate Income Tax and Withholding Tax

Beginning in January 2017, the State of Michigan will administer the Corporate Income Tax and Withholding tax for the City of Detroit. Drafts of City of Detroit CIT and Withholding forms have been posted for review under their respective links. Draft City of Detroit Withholding e-file information (schema, developer guides, etc.) has also been posted. Draft City of Detroit CIT e-file information (schema, developer guides, etc.) will be posted as it becomes available.

Sales, Use and Withholding and City of Detroit Withholding software developer testing calendar for tax year 2017:

  • Substitute Forms Testing – 10/1/2016 through 3/31/2017
  • E-File Testing – 11/4/2016 through 3/31/2017

Contact Information

E-mail: MIFormsEfile@michigan.gov
Telephone: 517-636-4450

WEB SITE ACCESS

All software developers that anticipate producing Michigan Department of Treasury (Treasury) computer-generated forms and/or tax preparation software must complete a Michigan Letter of Intent to Participate in E-File and Substitute Forms Programs (Form 4430). Forms can be e-mailed to the address listed above.

Software developers should view the Substitute Forms Submissions Manual for reference and guidelines.

If you had access to Treasury's secure site last year, you will utilize your existing username and password. If you are a new developer to Treasury, you will receive a username and password within three business days of submitting a completed Form 4430.

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.
2016 Tax Year
Substitute Forms and Electronic Filing Information
Individual Income Tax Michigan Business Tax
Corporate Income Tax Flow-Through Withholding Tax
Fiduciary Tax Vouchers with Doc IDs and Scanlines
Miscellaneous
(all forms without a scan line or Doc ID code)
Miscellaneous Forms Process
City Partnership and Estates & Trusts
2017 Tax Year
Substitute Forms and Electronic Filing Information
Sales, Use and Withholding Essential Services Assessment