How to File and Pay Michigan Sales Tax Online

The official Michigan sales tax login is Michigan Treasury Online (MTO). Use MTO to access your business tax account, select the relevant filing period and complete the required return and payment steps.

Before you log in to Michigan Treasury Online

Have your business account details, filing period, sales records and payment information ready. Check whether someone else has already filed the period before creating another submission.

Keep a working reconciliation of Shopify sales and any other channels. Separate sales, refunds, exempt transactions and tax collected so you can explain the totals you enter. If the return includes use tax or withholding obligations, gather those records too.

Choose the right Michigan sales tax form

Michigan's 2026 sales and use tax forms directory lists Form 5080 for monthly or quarterly sales, use and withholding tax returns, and Form 5081 for the annual return. The directory also provides amended-return forms and instructions. Check the form year and period before filing.

A regular monthly or quarterly return does not replace a separate annual return when one is required. Keep both on your filing calendar and follow the schedule assigned to your account.

Prepare your Shopify information

Choose the same reporting dates in your source records and working file. Compare the totals to the records used for the prior period so refunds or adjustments are not accidentally counted twice.

If a number in your records does not match the amount expected on the return, investigate the difference. Entering the total collected without checking the return instructions can leave unexplained discrepancies.

File and pay through MTO

1. Open Michigan Treasury Online and access the correct business account.
2. Confirm the return type and period before entering data.
3. Complete the return using the applicable form instructions and reconciled records.
4. Review the figures and submit the return.
5. Complete the payment steps required for your account and retain confirmation of both the return and payment.

Check the payment's effective date and status. A saved draft is not a filed return, and a return confirmation alone does not establish that the payment succeeded.

Keep a clear filing record

Save the filed return, supporting sales records, adjustment notes and payment confirmation together. Record the next filing deadline and any annual requirement while the account details are in front of you.

Need help filing Michigan sales tax?

BreezyFile connects with Shopify to help merchants manage state registrations and sales tax filings. See the service details and current pricing on the Shopify App Store.

See BreezyFile on the Shopify App Store