Run a tax estimate from forms and account statements
A user had ChatGPT total a US tax estimate from 1099s, a business spreadsheet, and brokerage records, then cross-checked the numbers against a tax package.
- What they did
- A commenter built a case study around individual US taxes by giving ChatGPT their 1099s, a spreadsheet for a self-run business, and brokerage records. They kept refining the setup for about an hour until the figures matched what they expected. Then they had ChatGPT compare its work with a PBC package and call out anything questionable.
- How it went
- They said the final tax calculation was accurate after about an hour of adjustments. ChatGPT also picked up basic tax-planning ideas correctly. People in the thread still stressed that tax work needs a careful human review because LLMs can get things wrong.
- Tips
- Expect to spend time tuning the inputs before the output settles down. Use the agent to draft and check, but have a person review everything before filing or paying anything.
Try it yourself with ChatGPT Agent
I’m estimating my US federal taxes for [year]. I’ll provide [forms], a spreadsheet covering my [self-employed business], and my [brokerage statements]. Please calculate a draft tax estimate with income breakdowns, deductions, self-employment tax, and capital gains, and point out any missing, inconsistent, or suspicious values. Before you do anything that would send, submit, pay, delete, or file, stop and ask me to approve it. Finish with a short assumptions list and a table I can compare against a professional review.
Fill in the [brackets]. Agents can make mistakes, so review anything before it is sent, paid or deleted.
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