Every year during tax season, I want to give my brain a patch: don't wait until the end of the year to review transaction records, it really drives you crazy. My simple method is to start by saving "exchange bills + on-chain transfers + notes" from the beginning, especially for those few deposits/withdrawals across different platforms. If I don't clearly record the source and destination, I can only guess later, and the more I guess, the more uncertain it becomes. Recently, there's been a debate in the group about whether privacy coins and coin mixing count as "outside the compliance boundary." Honestly, what you choose to use is your business, but don't fudge the records: keep evidence of time, amount, address, and purpose, even if rules change later, it’s easier to update. Anyway, I don’t aim for perfection in one go; I prefer small fixes and adjustments, so I don’t leave the blame to myself at the end of the year.