Claude Code helped a person almost two years behind on taxes untangle expenses, look up receipts and invoices, and navigate the Dutch tax system.
Claude Code helped a person almost two years behind on taxes untangle expenses, look up receipts and invoices, and navigate the Dutch tax system.
They built a local Python-based accounting workflow with Claude Code for a Dutch B.V. with a holding structure. Claude wrote scripts to pull two years of transactions from the Revolut API and bank CSVs, scrape Gmail for receipts and invoices, categorize 330+ transactions with LLM judgment, calculate VAT and reporting totals, and flag 19 edge cases for the accountant instead of deciding them alone.
In one afternoon it produced reports in the Dutch tax agency’s box format, cut the accountant’s workload from about 20 hours a year to 5, and caught that the shareholder-loan threshold had been exceeded by EUR 11K. The person still kept the accountant for corporate tax, R&D credits, and annual accounts.
During runtime it ran locally with external calls only to the bank and Gmail for source data; the API was mainly used earlier while Claude wrote and debugged the code.
I am behind on my [country] taxes for [years]. Look through the folder [path to folder] with my bank exports, receipts, and invoices, then build a spreadsheet of income and deductible expenses per year and a list of missing documents I need to find. Finish with a step-by-step plan for filing each year, and ask me before moving, renaming, or deleting any files.
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