Pull your Michigan Treasury Online records into your systems

What you can build on MTO

• Get SUW filing and payment history

  Build this

  Opens one business connection in the Sales, Use and Withholding Tax Service and reads its filing and payment history for a tax year.

  Takes

  Business name or account, tax year

  Returns

  Business, filing frequency, returns with period, form, filed date and status, payments with date, amount and method

• List SUW tax notices

  Build this

  Reads the SUW tax notices and letters Treasury has issued to one connected business.

  Takes

  Business name or account, issued since (optional)

  Returns

  Notice title, issued date, tax type, period, amount due if shown, link to the PDF

• Check bulk upload acknowledgments

  Build this

  Reads the Acknowledgements tab of MTO bulk upload: each return filename with its Accepted or Rejected status and rejection code.

  Takes

  Uploaded since (optional), status (optional)

  Returns

  Confirmation number, return filename, status, rejection code, error description, acknowledged date

• Schedule an SUW payment

  Build this

  Schedules an EFT debit payment for one business connection in the SUW Tax Service, for today or a future date.

  Takes

  Business name or account, tax type, period, amount, payment date, bank account on file

  Returns

  Confirmation number, payment date, amount, status

Automate MTO with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• Rejected bulk upload returns, every afternoon

  Build this

  Starts

  Every weekday at 17:30 (America/Detroit)

  Step 1

  Check bulk upload acknowledgments for returns uploaded today.

  Step 2

  Keep the returns with the status Rejected.

  Step 3

  Email you each one with its return filename, rejection code and error description.

• New SUW notices for each business you represent

  Build this

  Starts

  Every weekday at 8:00 (America/Detroit)

  Step 1

  For each business you name, list its SUW tax notices.

  Step 2

  Keep the notices that were not there on the last run.

  Step 3

  Post them to your system's webhook, one entry per notice, with the business and amount due.

• Monthly SUW history for accounting

  Build this

  Starts

  Monthly on the 25th at 9:00 (America/Detroit)

  Step 1

  For each business you name, get the SUW filing and payment history for this tax year.

  Step 2

  Keep the returns and payments that changed since the last run.

  Step 3

  Post them to your accounting system's webhook.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Get SUW filing and payment history” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "mto.treasury.michigan.gov/get_suw_filing_history",
    "input": {
      "business": "Acme Supply LLC",
      "tax_year": 2026
    }
  }'

{
  "status": "completed",
  "data": {
    "business": "Acme Supply LLC",
    "filing_frequency": "Monthly",
    "returns": [
      {
        "period": "2026-09",
        "form": "5080",
        "filed": "2026-10-17",
        "status": "Accepted"
      }
    ],
    "payments": [
      {
        "date": "2026-10-17",
        "amount": 4812.36,
        "method": "EFT Debit"
      }
    ]
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

MTO’s own options

Treasury documents no API for reading MTO accounts, notices or history. Treasury accepts SUW returns electronically in two ways: files uploaded through the MTO bulk e-file application, or a Web Service for transmitters, both only from software that passed Michigan's Assurance Testing System. Everything else is done on the MTO screens.

Read on November 12, 2026: 2026 SUW E-File Tax Preparer Handbook, MTO Tutorials, Accessing MTO.

Signing in to MTO

MTO signs people in through MiLogin for Business, the State of Michigan's single user ID and password for its online services, and a session ends after 15 minutes of inactivity. Every person has their own profile and connects it to one or more business tax accounts. With Fous, you sign in through that page with your own profile, and a method sees only the businesses your profile is connected to.

Worth knowing

Only Accepted returns count as filed

Returns not acknowledged as Accepted are not considered filed. Submissions received by noon ET get their acknowledgment by 5:00 PM ET the same day.

Accepted returns cannot be recalled

Once a return is accepted it cannot be changed, scheduled payments included. Changes go on an amended return, Form 5092 or Form 5082.

Connections are per person

Each person connects their own profile to a business and picks the SUW tax types for that connection. Guest Services sends returns and payments but shows little account detail.

Card payments are final

eCheck payments process at 8:00 PM ET and can be scheduled up to 365 days ahead. Card payments process at once and cannot be cancelled; debit cards cost $3.95 and credit cards 2.3%.

More in Government: US state and local tax

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• Florida DOR eServices File and Pay
• Georgia Tax Center
• INTIME
• LaTAP
• Maryland Tax Connect
• MassTaxConnect
• Minnesota e-Services
• My DOR
• myconneCT
• MyDORWAY
• myPATH
• MyTax Illinois
• MyTaxes Kentucky
• NCDOR eBusiness Center
• New Jersey Tax Portal
• NY Business Online Services
• OH|TAX eServices
• Texas Comptroller Webfile
• TNTAP
• Virginia Tax Business Online Services
• Wisconsin My Tax Account

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