More in Money, Bills & Taxes.
Find $6,000 in extra tax deductions with Claude Cowork
WorkedEvidence: Described by posterPosted Last checked
Viveka von Rosen's Claude Cowork review of tax-prep files surfaced an additional $6,000 in deductions after an extension filing.
How to use this
- Tap Copy prompt.
- Open the tool the case used (or a similar one) and paste the prompt; results may differ from the original.
- Paste it into the message box.
- Send it, then read the answer before acting on it.
New to this? What's a prompt?
A prompt is the message you send to the AI tool. Copy the one on this page, put your own details where it asks, and read the answer before you act on it.
Prompt
Recreated prompt
The source didn't share its exact prompt, so we wrote one from what it describes. The result shown is the source's, not ours.
The person didn't share their exact words, so we wrote this from what they described. We haven't tested it, and they didn't use this exact version.
Review my tax-prep folder and connected books for the year. Ask what else you need, then find missed deductions, mislabeled expenses and anything that might change my bracket. Quote each find with the source document. Do not file anything.
Try this in:
Sends the Recreated prompt shown above. ChatGPT and Grok open with it filled in, and ChatGPT may send it straight away. Gemini and Claude open empty, so we copy the prompt for you to paste. Every button also copies it.
The source used Claude Cowork, which can take actions in a browser or app. These are general chat tools, so results may differ, and a normal chat may only give you a plan.
Opens in a new tab. We don't see what you send.
These links are only a shortcut. We're not affiliated with OpenAI, Google, Anthropic or xAI, and your results may not match the source.
Optional stronger version
Our rewrite with extra checks. The poster didn't test it.
Before you start, ask me 1–3 short questions about the details below and wait for my answers. Once I've answered, confirm the plan in one line and run the whole task start to finish. Goal: Find missed deductions and mislabeled expenses in my tax-prep files. Questions to ask me first: - Which tax years and entities (personal vs business)? - Which folders and connectors can you access? - Who will review before filing? Inputs (fill in or confirm): - Years: [2025 / 2026] - Folder: [TAX PREP PATH] - Connectors: [ACCOUNTING / STRIPE] - Extra exports: [AMAZON / BANK / PAYPAL / VENMO / CARDS] Rules: - List each proposed deduction with the source file. - Flag mislabeled categories instead of silently fixing books. - This is preparation for a human/CPA review, not filing advice. - Never submit returns or send messages to the IRS. Checkpoint: After inventorying files, list gaps before deep review. If you get stuck: If a statement is missing months, stop and ask rather than extrapolating. Verify before you finish: Every dollar claim ties to a document name I can open. Output: A ranked list of finds with sources and open questions for my CPA. Done when: I can hand the list to a tax professional before filing.
AI tool
Outcome
Viveka von Rosen ran 2025 and 2026 tax-prep documents through Claude Cowork after filing an extension. With folder access, an accounting-software connector, Stripe, and downloads of Amazon orders, bank statements, PayPal, Venmo, Trello VA invoices and credit-card statements, Claude Cowork found an additional $6,000 in deductions—enough, von Rosen says, to change tax brackets—and flagged mislabeled transactions. The author stresses this is a personal story, not tax advice, and plans to confirm with proper filing.
Evidence: Described by posterThe person describes what happened in words, without screenshots or video.
Source
- Posted
- by Viveka von Rosen
- Last checked
- Method:
- How we verify
https://vivekavonrosen.substack.com/p/claude-paid-for-itself-yesterday
Context: Author explicitly says this is not CPA advice. Confirm every deduction with a tax professional before filing.
More in Money, Bills & Taxes
Audit Gmail subscriptions into keep, review and cancel lists with Claude
Claude scanned Abhijay Arora Vuyyuru's Gmail and found about $2,600 a year in subscriptions, flagging roughly $590 as recoverable.
WorkedClaudeEvidence: Described by posterView CaseBuild a weekly household budget rundown with Claude Cowork
Kate built a Claude Cowork budget folder that turns Sunday CSVs into an HTML dashboard, including a $47.23 Costco ask.
WorkedClaude CoworkEvidence: Described by posterView CaseCut tax-prep grunt work to about three hours with Claude Code
Chris Blattman used Claude Code to assemble donations, deductions and a Schedule C in about three hours versus a ~$1,000 accountant.
WorkedClaude CodeEvidence: Described by posterView CaseCut an Xfinity bill by $3,200 a year with Claude Cowork in Chrome
Ofer Ronen watched Claude Cowork cut an Xfinity bill by $3,200 a year in about 45 minutes, with only 17% from service cuts.
WorkedClaude CoworkEvidence: Described by posterView CaseFind duplicate subscriptions in card statements with Claude Cowork
Claude Cowork coded through Saul Kropman's six months of statements and flagged duplicate ChatGPT/Claude spend of $180–$370 a year.
WorkedClaude CoworkEvidence: Described by posterView CasePick open-enrollment benefits with Claude after an HSA hallucination
Claude helped Christie Pitts aim for $14,766 in benefits savings but wrongly said a plan was HSA-ineligible until corrected.
PartialClaudeEvidence: Described by posterView Case
Similar cases
Track every K-1 and 1099 and prep for a CPA with a Claude Cowork project
Claude Cowork tracked every K-1 and 1099 from a hundred-page statement in two minutes and caught a deferred gain the owner missed.
WorkedClaude CoworkEvidence: Described by posterView CaseSort a year of bank transactions for a freelancer's tax filing with Gemini, Claude and Lumo
Only Claude matched the manual income total from bank exports; Lumo missed about a third and Gemini was close: partial.
PartialGemini +2Evidence: Article or interviewView CaseEstimate the year's federal, state and local tax still due from a folder of tax documents with Claude Cowork, before the accountant reports
Claude Cowork read a folder of tax PDFs and scans and estimated the 2025 balance due in 30 minutes.
WorkedClaude CoworkEvidence: Described by posterView CaseA tax deduction strategy from ChatGPT that would have cost a business owner: an accountant's story
An accountant says ChatGPT's $40,000 deduction plan was misapplied and outdated; it was caught before filing: a failure.
FailureChatGPTEvidence: Described by posterView CaseAppeal a higher home valuation with ChatGPT Deep Research
ChatGPT Deep Research found comps and drafted Ala Stolpnik's property tax appeal; the county accepted it, saving $250 a year.
WorkedChatGPT Deep ResearchEvidence: Described by posterView Case

