Business Taxes IconMBT/CIT - Ask a Question

  • For account specific questions, you will need to include the business’s indentifcation number and address as well as your relationship to the business. Addtionally, if responding to a notice we sent to you include the letter ID and/or Notice Date printed at the top of page one.

Other ways to contact the Department of Treasury with questions about your business taxes.

  • Phone Number

    Call Us



  • Mailing Address

    Mail Us

    P.O. Box 30059

    Lansing, MI 48909