Michigan - MI - Michigan Treasury Online

Michigan Treasury Online (MTO) is a web-based portal operated by the Michigan Department of Treasury for managing state tax obligations. It serves individual taxpayers, businesses, and tax professionals who need to register accounts, file returns, and remit payments electronically. The platform supports a range of tax types, including sales, use, withholding, and corporate income taxes, along with specialized filings like the Michigan Business Tax and Corporate Income Tax. Users can access services such as viewing account balances, checking correspondence from the Treasury, amending previously filed returns, and managing power of attorney designations. The system is designed to streamline compliance by consolidating tax administration functions into a single online interface accessible at mto.treasury.michigan.gov.