Build an IRS filing tool for employment tax forms
A builder is creating an MCP server so an agent can submit IRS employment returns after preparing them.
- What they did
- They are wiring up an MCP server that turns IRS return submission into a tool call for an agent. The first forms in scope are 941 and 940, with corporate and individual returns planned later. The work is still in IRS ATS certification, including credential checks, schema validation, and SOAP handshakes.
- How it went
- Nothing can be filed yet. The server is not live until certification is finished and an early-access sandbox opens. No filings, acceptance, or rejections have been reported.
- Tips
- Treat this as infrastructure work, not a finished filing workflow. Plan for ongoing upkeep, since the certification has to be renewed every year.
Try it yourself with Claude Code
Help me set up an MCP server for [business name] that exposes a tool called [tool name] for IRS employment tax returns. Prepare and validate the data for [form type] using the payroll file at [path], check that all required fields are present, and calculate totals. Show me the completed form data and then pause for my approval before any submission or other irreversible action. If anything is missing or inconsistent, list the issues first and stop.
Fill in the [brackets]. Agents can make mistakes, so review anything before it is sent, paid or deleted.
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