Get your Ohio Business Gateway filings through an API

What you can build on the Gateway

• Get period balances

  Build this

  Opens OH|TAX eServices from the Gateway dashboard and reads View Period Balances: the outstanding balances due and the action each period still needs.

  Takes

  FEIN or SSN of the business account, tax type

  Returns

  Tax type, filing period, balance due, action needed

• List returns and their status

  Build this

  Reads View returns and period balances in OH|TAX eServices: each filing period, whether a return was filed and its status.

  Takes

  FEIN or SSN, tax type, periods from (optional)

  Returns

  Filing period, return status, actions available

• File a UST 1 sales tax return

  Build this

  Opens File now for the current period in OH|TAX eServices, enters gross and exempt sales by county, reviews and files the UST 1 with the payment option you choose.

  Takes

  FEIN, filing period, gross sales and exempt sales per county, payment option

  Returns

  Filing period, reportable taxable sales, tax due, payment option, confirmation

Automate the Gateway 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.

• Periods that still need action, every business account

  Build this

  Starts

  Every Monday at 8:00

  Step 1

  For each FEIN you list, get the period balances for each tax type.

  Step 2

  Keep the periods with a balance due or an action needed.

  Step 3

  Email you the list, one section per business account.

• Returns not yet filed for last month

  Build this

  Starts

  Every month on the 10th at 9:00

  Step 1

  For each FEIN, list the returns and their status for last month's filing period.

  Step 2

  Keep the periods with no submitted return.

  Step 3

  Post each one, with FEIN, tax type and period, to your webhook.

• Changed balances, handed to accounting

  Build this

  Starts

  Every weekday at 7:00

  Step 1

  For each FEIN, get the period balances for each tax type.

  Step 2

  Keep the periods whose balance changed since the last run.

  Step 3

  Post FEIN, tax type, period and the new balance 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 period balances” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "gateway.ohio.gov/get_period_balances",
    "input": {
      "fein": "00-0000000",
      "tax_type": "Sales Tax"
    }
  }'

{
  "status": "completed",
  "data": {
    "account_name": "Acme Supply LLC",
    "tax_type": "Sales Tax",
    "periods": [
      {
        "filing_period": "2026-10",
        "balance_due": 1842.37,
        "currency": "USD",
        "action_needed": "File return"
      },
      {
        "filing_period": "2026-09",
        "balance_due": 215,
        "currency": "USD",
        "action_needed": "Pay balance"
      }
    ],
    "count": 2
  }
}

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.

The Gateway’s own options

Ohio's guides describe filing on screen: you sign in to the Gateway with OH|ID and go on to OH|TAX eServices, where business taxes such as sales tax are filed and paid. The one file exchange they describe is the UST 1 data file upload, which takes only .xlsx files. The guides we read name no public API.

Read on November 12, 2026: File Original/Amended Return and Remit Payment (Ohio Department of Taxation), New Business Setup (Ohio Department of Taxation).

Signing in to the Gateway

You sign in to the Gateway with your OH|ID and its two-step verification, and OH|TAX eServices may ask for two-step verification again. Each user holds a role on each business account. With Fous you sign in once through the Gateway's own sign-in with your own OH|ID: the login is sealed with AES-256, and code and AI agents never see it.

Worth knowing

Start in the Gateway, finish in eServices

A business tax return begins on the Gateway dashboard with the OH|TAX eServices transaction and is filed in OH|TAX eServices. A business must be registered on the Gateway before it can be set up there.

Roles decide who files

Each user picks Filing Administrator, Filer or Non-Filer on a business account. Whoever first registers a FEIN or SSN on the Gateway becomes its primary Filing Administrator.

One UST 1 for all locations

All of a business's Ohio locations are filed on one UST 1 return. The UST 1 data file upload accepts only .xlsx files.

No payment vouchers

Payment vouchers are no longer available. A check or money order must carry the Ohio vendor license number and the period, and Pay Later balances are subject to interest and penalties.

More in Government: US state and local tax

• MyFTB
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• Colorado Revenue Online
• Florida DOR eServices File and Pay
• Georgia Tax Center
• INTIME
• LaTAP
• Maryland Tax Connect
• MassTaxConnect
• Michigan Treasury Online
• 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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