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Questions about connecting accounts, reconciling your 1099-DA, or exporting forms? We're here to help.
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About Basisfyle
Basisfyle builds crypto tax software for the 1099-DA era. Our reconciliation engine assembles your complete transaction history across exchanges, wallets, and blockchains, matches every disposal to its true cost basis, and produces IRS-ready Form 8949 and Schedule D exports with a full audit trail.
We are a software company, not a tax advisory. We work alongside your CPA โ many accountants file directly from our reports.
Common questions
Starting with tax year 2025, crypto brokers file Form 1099-DA with the IRS to report your digital asset sales. The IRS now sees your proceeds before you file โ but the form often lacks complete cost basis, which can make your gains look much larger than they really are.
Three common reasons: (1) the broker doesn't know what you originally paid if you bought elsewhere, so basis is reported as zero or blank; (2) transfers between your own wallets can be misread as taxable sales; (3) losses on other platforms never appear on a single broker's form. All three inflate your apparent gain.
Never. Exchanges connect via read-only API keys, and wallets are added by public address only. We can see transaction history, but no one โ including us โ can move your funds.
A Form 8949 and Schedule D report formatted for import into major tax-filing software, plus a line-by-line reconciliation your CPA can use to explain any difference from broker-reported numbers.
It's built to handle high-volume histories, including swaps, staking rewards, bridging, and NFT trades, with every adjustment documented in the audit trail.
No โ Basisfyle is software that organizes and reconciles your transaction data. For decisions about your specific situation, talk to a qualified tax professional. Many CPAs work directly from our reports.