Emergency-related state tax relief available for taxpayers located in twelve northern Michigan counties impacted by March 2025 storms.
Corporate Income Tax - Ask a Question
Corporate Income Tax - Ask a Question
Update Account
Access Michigan Treasury Online (MTO) to make a payment, manage Treasury business tax account information, and authorize a representative/power of attorney.
Ask a Question
Taxpayers can utilize the Business Taxes eService to ask Treasury general or account-specific questions related to corporate income tax (CIT). Treasury provides responses to these questions electronically within 7 business days. If your question is related to a letter you received from Treasury, have a copy of the letter available to provide the Letter ID.
For additional resources and helpful information visit the Business Taxes eService Help Center.