Michigan`s petition to join the Streamlined Sales and Use Tax Agreement and Michigan`s Certificate of Compliance was published on January 31, 2005 on the Michigan Treasury Department website and filed on January 31, 2005 with the co-chairs of streamlined online sales states. On July 31, 2020, the State Treasurer submitted the following documents to the Executive Director of the Streamlined Sales Tax Governing Board: the Michigan recertification letter, a revised taxability version and the revised Certificate of Compliance. You`ll find the latest version of Michigan`s profitability matrix in sst.streamlinedsalestax.org/otm/. Click the Michigan tab to view, print or download the profitability matrix. The latest version of the Michigan Certificate of Compliance can be accessed at sst.streamlinedsalestax.org/coc/. Click the Michigan tab to view, print or download the Certificate of Compliance. If you sign up for the optimized VAT project, you should also use this link to adjust your power line registration when you sell or hire your business. Certified Service Providers (CSPs), sellers who use certified Automated Systems (CASs) and sellers who use the Online Treasury Form can forward EST-SER to Treasury.