I’ve recently started to carefully organize my transaction records; otherwise, I’ll really go crazy by the end of the year. To be honest, you can’t rely on memory for reconciliation: I now export a fixed report every week for CEX trades, deposits and withdrawals, and on-chain transfers, and I record everything in the same table with “Time - Platform - Asset - Quantity - Fee - Counterparty/tx hash.” I’m too lazy to keep screenshots; TXT/CSV files are more reliable. The most annoying part of on-chain activity is all the fragmented transactions like various authorizations, airdrops, NFTs, etc., especially recently with all the back-and-forth about NFT royalties. I don’t care if creators earn less, but if I miss any part of my costs or transfer records, it gets pretty awkward when I report.