Taxes - Tax Practitioners

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• MBT Frequently Asked Questions
Frequently asked questions about the Michigan Business Tax.

Tax Practitioners

• LISTSERV PDF icon
Sign up to receive electronic delivery of information from Treasury. View previous messages from the Treasury Tax Professionals' ...

• Software Developers
Information on draft tax forms; file specifications, test package and related information for e-file and 2-D barcoding.

• Practitioner Services
Enter a service request for your individual income tax or business tax client.

What You Need to Know

For a general question please check Frequently Asked Questions before contacting Treasury.

If you have a Power of Attorney and/or additional documentation, please fax them to 517-636-4254.

Please be patient! If you have already submitted a Web service request or called the Practitioner Hotline, allow staff the time to research and respond to your service request. Most responses are resolved within 5 business days.

For privacy and security reasons, do not share the access codes for the Practitioner Services site with your clients. Obtaining taxpayer information is a privilege. Unauthorized access to account information is unlawful as described in Michigan (MCL) 752. Taxpayers can use the self service options designed for them.

When accessing the Practitioner Services site, please remember, business accounts that begin with 2 alpha characters (ME or TR) must be entered using upper case letters. If you use lower case letters at the time you submitted your service request, you will be unable to retrieve/view the answer. You will receive a "Failed Authentication" error message.

• Information for Taxpayer Volunteer Groups
Taxpayer Assistance Manual and other information for taxpayer volunteer groups.

• SBT e-file Customer Service Number (CSN) Information
If you lost or misplaced your CSN letter, use the "Check My Business Tax Info" option to view your CSN.

• Power of Attorney
MCL 205.28(1)(f) strictly prohibits employees of the Department of Treasury from disclosing confidential tax information to anyone other than the individual taxpayer or his or her authorized representative.

• Voluntary Disclosure
According to section M.C.L. 205.30c of Public Act 221 of 1998, the Commissioner, or his representative, may enter into a voluntary disclosure agreement with nonfilers who have not been previously contacted by the Department and who meet certain other criteria.

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