Prepare and file overdue German VAT statements
Cowork with Claude's Chrome extension prepared accounts from invoice PDFs, then logged into Elster and submitted the overdue Q3 2025 VAT forms.
Done withClaude CoworkClaude in Chrome
- What they did
- Gave Claude Cowork a project folder holding invoice and receipt PDFs and asked it to prepare accounts for each quarter. Logged into Elster, then used the Claude Chrome extension to locate the forms, fill them with the prepared data, and submit the Q3 2025 VAT statements. Recorded the browser session and later asked Claude to redact personal details and speed the video up 3x.
- How it went
- The overdue Q3 2025 statements were filed. No other results or shortfalls reported.
- Worth knowing
- Used only Anthropic's off-the-shelf Cowork and Chrome extension with no programming.
Try it yourself with Claude Cowork
Use the invoice PDFs in [folder path] to prepare my accounts and a VAT summary for [period]. Then open [tax portal, e.g. Elster] in my browser, and fill in the VAT return form with the figures. Stop before submitting and show me every number you entered so I can approve the filing.
Source: X · Feb 9, 2026
Five of these in your inbox every morning
The best things people got an AI agent to do, each with the prompt to try it.
More like this
Fill in a tax organizer and review last year's return
Claude in Chrome captured the organizer's fields and entered data, Claude Code filled them in, and Claude reviewed the prior return; it sometimes claimed work was done without the info.
Delegate calendar, inbox and travel booking to a personal work agent
Authors use Cowork or Claude Code to schedule invites, triage email, book flights and hotels, pull Airtable data and scrape exhibitor lists.
Test local web apps and fix errors in one session
Claude Code with Claude in Chrome writes code, opens localhost, clicks through the UI, reads console errors and fixes them without the developer touching the browser.
- Custom agent
Shop for umbrella insurance through your personal agent
Personal AI agents use Coverage Cat's Agent API/MCP to size umbrella coverage and compare carrier options with price ranges, backed by a licensed broker.
Fill forms and review tax filings with Codex computer use
Secondhand accounts of OpenAI staff using Codex computer use for forms and PDFs, including one tax filing review that caught an error worth thousands.
Track investments over time via Claude Code and Robinhood MCP
Poster asks how to get Claude Code connected to Robinhood via MCP to keep tracking investments after researching or trading; a question, not a finished result.