Koinly builds tax reports from exchange, wallet, and blockchain data. Transactions are imported through API keys or CSV files, matched against a price history, and turned into capital gains calculations using the method required by the selected country.
Reports cover many jurisdictions and include the schedules local tax authorities expect, together with a portfolio view that shows current holdings and realised results. Unmatched transfers and missing cost basis entries are flagged in a review screen before anything is exported.
Windows 10/11 x64, 4 GB RAM, exchange read-only API keys