Fill forms and review tax filings
Observed in the wild: a tax filing review uncovered a significant error due to Codex computer usage by OpenAI staff, as well as secondhand accounts from individuals who used the system for forms and PDFs.
- Agent or tool
- Codex
- Topic
- Finance
- Reported on
- Added
- 2026-10-15
Why it matters
Money tasks are tedious but high-stakes, which is exactly where a careful agent helps: it does the checking and paperwork while a person keeps the final say. It is one of 65 sightings filed under Finance on Agent Sightings (number 24 by interest), and one of 32 involving Codex.
How you could try it
Here is a reusable prompt, written by us in our own words, that captures the task. Paste it into Codex or any similar agent and adjust the details to your situation.
Finance task: fill forms and review tax filings. Tabulate numbers, mark uncertainties, and do not file, pay, or submit until I confirm.
Tip: Keep the agent in 'propose, don't pay' mode: let it gather numbers and draft messages, and approve any payment or account change yourself.
Source
Read the original first-hand account on Reddit: https://www.reddit.com/r/codex/comments/1ru9i8u/do_you_use_codex_for_noncoding_…. Our summary is a paraphrase; details are in the source.