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rp2
Privacy-focused, free, open-source cryptocurrency tax calculator for multiple countries: it handles multiple coins/exchanges and computes long/short-term capital gains, cost bases, in/out lot relationships/fractioning, and account balances. It supports FIFO, LIFO, HIFO and it outputs in form 8949 format. It has a programmable plugin architecture
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
The first thing I would do is compute taxes correctly using good tax software. RP2 is a good option because it's free, non-commercial, open-source and privacy-focused. It also has transparent computation: it generates full computation details for every lot fraction, so that it's possible to verify step-by-step how RP2 reaches the final result, which can be handy in an audit scenario.