Michigan Sales Tax Login (MTO): How to File and Pay

Updated October 2026

Quick answer: The Michigan sales tax login is Michigan Treasury Online (MTO). Sign in through MiLogin for Business, open Sales, Use and Withholding Taxes, choose your business and select File and Pay for the period. Monthly returns are due on the 20th of the following month.

How the MTO login works

1. Go to mto.treasury.michigan.gov and choose to log in through MiLogin.
2. Sign in with your MiLogin for Business account or create one. This sign-in also serves other Michigan business services.
3. Back in MTO, open Sales, Use and Withholding Taxes, choose your business, then File and Pay.
4. Select the period. Form 5080 is for monthly and quarterly returns; Form 5081 is the annual return.
5. After submitting the return, complete payment through MTO's separate Paymentus payment page. Keep it open until you have confirmation.

See Treasury's MTO tutorials and electronic payment guidance.

When Michigan sales tax is due

• Monthly: the 20th of the following month.
• Quarterly: April 20, July 20, October 20 and January 20.
• Annual return: February 28 of the following year, for every filer regardless of frequency.

Weekend and state-holiday deadlines move to the next business day. Treasury assigns filing frequency each year. Businesses assigned accelerated payments have additional payment deadlines. Check the official due-date guidance.

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.

Monthly and quarterly filers must also file Form 5081 by February 28 of the following year, adjusted for weekends and state holidays. Form 5080 does not replace that annual return. Keep both on your calendar.

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.

Stuck at the MTO login?

• You are asked for MiLogin. That is expected: MTO uses MiLogin for Business to sign you in.
• You see a temporary error or blocked message. Check for an MTO outage, then retry in a single browser tab. Treasury advises against simultaneous MTO sessions in multiple browsers or tabs. See its access troubleshooting guidance.
• Your business does not appear. Your user profile may not yet be connected to the business tax account. Contact Treasury's Sales, Use and Withholding Taxes team for help with access through Michigan Treasury's tax website.
• You need a paper-return mailing address. Check the current year's Form 5080 instructions in the forms directory above. MTO provides an electronic submission confirmation.

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

Using Shopify Tax for calculations? Explore your sales tax filing options with BreezyFile.