Get your Texas Webfile records through an API

What you can build on Webfile

• Get Webfile transaction history

  Build this

  Reads View Transaction History for one taxpayer account and tax type: the electronic reports and payments sent through Webfile.

  Takes

  Taxpayer number, tax type, period (optional)

  Returns

  Transaction type, date and time, reference number, period, end date, amount, status

• Read a period's return summary

  Build this

  Reads View Return Summary for one taxpayer account and period: the return data, payments and balance due on file.

  Takes

  Taxpayer number, tax type, period

  Returns

  Period, reported amounts, payments, balance due

• List taxpayer accounts and tax types

  Build this

  Reads the My Taxpayer Accounts table on the Webfile dashboard: each taxpayer account on your profile and its tax types.

  Takes

  Nothing

  Returns

  Taxpayer number, tax types

• Make a payment only

  Build this

  Uses Make a Payment Only to pay or prepay the current period, or a period with an open liability, by electronic check dated for the day you choose.

  Takes

  Taxpayer number, tax type, period, amount, payment date

  Returns

  Reference number, period, amount, payment date, status

Automate Webfile 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.

• Reports and payments not yet Processed, every account

  Build this

  Starts

  Every weekday at 8:00 Central Time

  Step 1

  List the taxpayer accounts and tax types on your Webfile profile.

  Step 2

  For each one, get the transaction history for the current period.

  Step 3

  Keep the transactions whose status is still Submitted.

  Step 4

  Email you the list, one section per taxpayer account.

• Balance due after filing, by taxpayer account

  Build this

  Starts

  When your system calls the workflow's webhook with the period you just filed

  Step 1

  For each taxpayer account you name, read the return summary for that period.

  Step 2

  Keep the periods with a balance due above zero.

  Step 3

  Post taxpayer number, period, payments and balance due to your accounting system's webhook.

• New Processed payments, handed to accounting

  Build this

  Starts

  Every day at 18:00 Central Time

  Step 1

  For each taxpayer account you name, get the transaction history for the current period.

  Step 2

  Keep the Payment transactions that are Processed now and were not on the last run.

  Step 3

  Post reference number, period, amount and date to your 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 Webfile transaction history” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "security.app.cpa.state.tx.us/get_transaction_history",
    "input": {
      "taxpayer_number": "32000000000",
      "tax_type": "Sales and Use",
      "period": "2609"
    }
  }'

{
  "status": "completed",
  "data": {
    "taxpayer_number": "32000000000",
    "tax_type": "Sales and Use",
    "transactions": [
      {
        "transaction_type": "Return",
        "date_time": "2026-10-19T14:02:00-05:00",
        "reference_number": "000000418273",
        "period": "2609",
        "end_date": "2026-09-30",
        "amount": 4812.37,
        "status": "Processed"
      }
    ],
    "count": 1
  }
}

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.

Webfile’s own options

The Comptroller has no web API for Webfile. Businesses reporting many outlets, leases, schedules or authorities can file sales and use, motor fuels, natural gas and crude oil, and IFTA reports by EDI (ANSI ASC X12 813) after registering and passing a test. Large payers send payments through TEXNET. Everything else is Webfile.

Read on November 12, 2026: Electronic Data Interchange (EDI), File and pay, Sales tax Webfile main menu.

Signing in to Webfile

eSystems signs you in with a user ID and a case-sensitive password of 10 to 25 characters, and keeps a security question for password resets. You then add each taxpayer's access with its 11-digit taxpayer number and Webfile number. With Fous you sign in once through the eSystems sign-in with your own account: the login is sealed with AES-256, and an expired session is signed back in.

Worth knowing

A Webfile number per tax and taxpayer

Access is added once for each tax or fee and taxpayer. RT numbers cover every tax except franchise, XT numbers cover franchise tax reports and FQ numbers the Franchise Tax Questionnaire.

History shows Webfile activity only

View Transaction History lists the reports and payments sent through Webfile. A TEXNET payment shows as status TEXNET without its amount, and Submitted becomes Processed once the account is updated.

Periods are written as YYMM, YYQ or YYYY

Monthly periods read YYMM, quarterly YYQ and annual YYYY, with End Date as the period's last day. Ask for the period in that form when you build a method.

The deadline is 11:59 p.m. Central Time

Webfile returns are due by 11:59 p.m. CT on the due date. You can post-date the electronic check. A late return may carry a $50 penalty.

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