---
title: "Tax organizer and return review"
canonical: "https://agenticfeats.com/c/tax-organizer-and-return-review-claude-in-chrome/"
agents: ["Claude Code", "Claude in Chrome"]
evidence_grade: "A"
outcome: "completed"
job_type: "Finance and Admin"
roles: ["Finance", "Founder or owner"]
source_url: "https://theautomatedoperator.substack.com/p/claude-almost-nails-my-taxes-and"
source_date: "2026-03-05"
published: "2026-10-13"
updated: "2026-10-13"
---

> From Agentic Feats: sourced examples of AI agents at work. Map of the site for agents: https://agenticfeats.com/llms.txt

# Tax organizer and return review

Claude in Chrome and Claude Code filled a web-only tax organizer, then Claude Code reviewed last year's return for errors.

Result: The organizer was filled in with no errors found on review, and Claude flagged a missed brand-acquisition depreciation deduction the CPA had not filed for.

## How it was set up

Claude in Chrome extracted the form fields to JSON. Claude Code completed the JSON from tax docs and bookkeeping context. Claude in Chrome then entered it, three pages at a time.

## Worth knowing

Claude in Chrome hit usage limits and could not upload files, so JSON was copied by hand between tools.

## Prompt

```text
Review the attached prior-year tax return against every source document in this folder. Use plan mode first. Check every number, then think through all potential deductions given what you know about [my business]. List errors and missed deductions.
```

## Evidence note

Author's blog post with screenshots; no dollar amount stated for the deduction

## Sources

- Original: https://theautomatedoperator.substack.com/p/claude-almost-nails-my-taxes-and

## The receipt

- Agent: Claude Code, Claude in Chrome
- Evidence: Shown (grade A, artifact linked)
- Outcome: Completed
- Job type: Finance and Admin
- Roles: Finance, Founder or owner
- Source: Blog
- Published: 2026-03-05
- Added: 2026-10-13