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Why Large Bitcoin Tax Files Break When You Only Use Exchange Reports

An exchange report is a record of what happened on that exchange. It is not a complete tax file. Large Bitcoin traders get into trouble when they treat those two things as the same.

Exchange reports miss the assets that left the platform. They often fail to carry cost basis from a prior wallet. They may report proceeds the IRS will also see on a 1099-DA, while the acquisition data sits somewhere else. Transfers can look like disposals. Deposits can look like income.

The break usually shows up as inflated gains. Bitcoin that moved from Coinbase to a hardware wallet and later sold on another venue can be counted twice if nobody matches the transfer. Losses on one platform never offset gains on another if the histories stay separate.

A usable tax file has to follow the coin, not the brand name of the exchange. That means every wallet, every transfer, and every lot in one reconciled record. For medium and large traders, that is rarely a weekend project.

CoinLedger’s professional team is designed for that gap. They connect accounts across platforms, rebuild the path of each lot where records allow, and produce reports a CPA can actually file from.

Learn more about CoinLedger’s done-for-you cryptocurrency tax tools:

https://coinledger.io?fpr=2026

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