Please be patient! If you have already submitted a request or called the Tax Professional's Helpline, allow staff the time to research and respond to your request.
Please be aware! Contacting eService or Helpline does not extend or pause appeal deadlines that are set by law. If your client has time remaining to appeal, we strongly encourage you to do so as soon as possible by following the instructions described within the notice.
Please submit the Authorized Representative Declaration, form 151 to the appropriate contact below.
Individual Income Tax : Fax (517) 636-4488
Business Tax : Email treas-registration-151@michigan.gov