Claude prepares and submits German VAT forms

Andrew Jefferson reports using Claude Cowork and the Claude Chrome extension to handle overdue German VAT statements for the third quarter of 2025. He began with a project folder containing PDF invoices and receipts and asked Cowork to prepare the accounts for each quarter. The subsequent browser task used those prepared records rather than starting from an unsupported estimate.

Jefferson logged into Elster himself. He then asked the agent to locate the relevant forms, enter the information and submit them. His original post says the filing was completed and includes a recording of the final part of the workflow. He also asked Claude to redact personal information and speed up that recording before sharing it.

The publication does not include the underlying returns, account reconciliation or an independent assessment of tax correctness. It therefore supports an author-reported portal submission with a human login handoff, not a guarantee that the amounts, periods or treatment were correct. The recording is evidence of the reported interface sequence rather than a substitute for checking the submitted records. The original February post date is kept separate from the earlier tax period covered by the work.

Prompt
Suggested prompt (written by Agents In Use, not the author's)

Source: X · Andrew Jefferson