High-volume Bitcoin traders do not start tax season by opening a blank spreadsheet. They start by asking whether last year’s records can survive an IRS review. That is a different job from checking an exchange dashboard. Large traders usually have activity on more than one platform. Bitcoin moves from a trading account to cold storage, then back out for liquidity. Some lots were bought years ago. Some were acquired after a transfer that no exchange labeled correctly. A year-end 1099 may show proceeds without a usable cost basis. The traders who stay out of trouble treat reconciliation as the first task, not filing. They gather every exchange, wallet, and business account. They match transfers so internal movements are not counted as sales. They rebuild missing basis. Only then do they look at Form 8949 and income reports. That work is slow if you do it yourself after a heavy trading year. It is the reason many larger traders hand the file to a specialist team. CoinLedger’s Done Fo...