Review tax returns and books to catch missed deductions
Claude connected to Stripe, Mercury and QuickBooks reviewed tax return PDFs and P&L, reportedly finding an $8,000 issue the CPA had missed. ·
Done withClaude
- What they did
- The post describes Claude connected through three MCP connectors to Stripe, Mercury, and QuickBooks, then given prior tax-return PDFs and the current P&L to compare across systems. It was prompted to flag claims the books were not set up to capture, miscategorized contractor and software expenses, and missed deductions, then draft a memo for the CPA rather than make the tax call itself.
- How it went
- The reported result was about $8,000 found, mostly from a one-time backlog correction across two years, not an ongoing savings figure. The setup kept humans on approvals and filing, with Claude reading, drafting, and creating drafts but never posting changes directly.
- Worth knowing
- Their stated rule was Claude reads and drafts, never posts; QuickBooks changes stayed as drafts for approval, which they treated as the trust boundary.
Try it yourself with Claude
Review my [year] tax return PDFs and my profit and loss statement for [business name], using the data from [Stripe, bank, and QuickBooks, or uploaded exports]. Look for missed deductions, miscategorized expenses, or numbers that don't reconcile, and estimate the dollar impact of each. Give me a ranked list with the evidence for each item and questions I should bring to my accountant. Don't change any records or file anything.
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Source: Reddit · Jun 11, 2026
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