We moved crypto across wallets and exchanges for years. Now the broker statement is incomplete. How should the basis rebuild file be structured?
The business used multiple custodians, several self-hosted wallets, and a long chain of transfer-ins before finally selling through a broker that issued only partial digital asset reporting. The accounting problem now is not whether there was a sale. It is how to build a basis file that survives scrutiny when the acquisition history is split across several systems.
I am not asking for software recommendations. I want the structure of the tax file itself. If we need date, quantity, dollar value, wallet path, transfer-in evidence, and transaction-cost support tied together in one reconciliation file, I want to know that before the team starts rebuilding in a sloppy way.
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