Firm-wide AI tax review layer with Claude API

Build a firm-wide AI review layer that ingests every prepared return, runs a Claude API batch check for preparer errors, missed credits, and state-specific edge cases, and pushes findings into the reviewer's queue. CPA still signs and e-files.

Tool

Claude API + firm review workbench

Open tool

Best for

Analysis & Decisions

Typically under $0.15 per return on Sonnet tier

Setup

5 hrs

One-time setup estimate

Workflow

1Collect the source material for "Prepare and review federal and state tax returns" before opening the tool.
2Run the starter prompt in Claude API + firm review workbench and paste in the real context.
3Review the output for accuracy, tone, names, numbers, and policy-sensitive details.
4Save the improved prompt or checklist so the next run takes less time.

Inputs you need

- Accountant
- Prepare and review federal and state tax returns
- Examples, notes, files, or customer context for this task
- Your preferred tone, constraints, and final format

Expected output

- Firm-wide AI tax review layer with Claude API
- A usable draft or workflow for prepare and review federal and state tax returns
- A repeatable prompt you can improve after each run

Ready-to-copy asset

Starter prompt

You are reviewing one prepared tax return for potential errors and missed opportunities. Return JSON only.

Inputs:
- return_type (1040, 1120S, 1065, etc.)
- jurisdictions: [federal, state(s)]
- return_summary (key totals)
- schedule_summary (by schedule)
- prior_year_return_summary
- firm_review_rules: [list of firm-specific flags]

Return:
{
  "preparer_errors": [{"issue": "...", "line_reference": "...", "severity": "low|medium|high"}],
  "missed_credits_or_deductions": [{"item": "...", "irc_or_state_ref": "...", "confidence": "low|medium|high"}],
  "jurisdiction_edge_cases": [{"state": "...", "flag": "..."}],
  "reviewer_questions": ["..."],
  "overall_confidence": "low|medium|high"
}

Do not output 'approved' — only findings. Any item with confidence < medium must be labelled 'needs CPA verification'.

Caveats

- Do a human review before sending, publishing, filing, or making a decision.
- Verify numbers, names, claims, citations, and compliance-sensitive details.
- AI drafts. You decide. Final responsibility is yours.

Measurable value

3.3 hrs saved per run

Before: 4 hrs. After: 45 min.

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