Holding a coffee, I went through the records of the exchange and wallet again, and it’s really true that the earlier you leave a trace, the safer you are. I only remembered at the end of the year “which day I bought and sold these hundreds of transactions,” which is basically asking for trouble... My current clumsy method: every time I transfer a large amount in or out, I casually note a line (time, chain, address, purpose), and keep a screenshot + export a CSV as well, don’t just rely on the platform to always provide you with records. On-chain interactions shouldn’t just look at transaction hashes; if you don’t understand, write a note about what you did at that time—human-readable comments are more helpful than any metrics. Recently, new L1/L2 projects are incentivizing to pull TVL, and many people are “mining, transferring, selling” back and forth, making records more chaotic. Anyway, it’s better to organize the transaction history first, rather than waiting until tax/report time to piece everything together.