Sale amount differs
Compare the form with the broker’s transaction-level export and identify the exact disposal that differs.
Crypto record screening before you file
Find the records your 1099-DA may not show.
Use the free Record Complexity Check to identify missing acquisition history, wallet-transfer gaps, multi-exchange records and DeFi activity that may need review before you rely on your crypto tax form.
Educational screening only · Not tax preparation · Not a determination that your form is wrong
Direct answer
What is a 1099-DA mismatch?
A possible 1099-DA mismatch exists when the form, broker export, wallet history, original acquisition records or crypto tax software do not agree. The difference may involve proceeds, cost basis, asset transfers or transaction classification. A difference does not automatically prove the form is wrong.
For 2025 transactions, Form 1099-DA generally reports gross proceeds for covered reportable broker transactions, while basis reporting phases in for certain covered assets sold from 2026. Taxpayers still need their own records to calculate basis. See the IRS recipient guidance.
This site does not calculate tax liability. It helps you identify and organize records before contacting the issuer, using tax software, sharing records with a preparer, or seeking qualified advice.
Transparent screening tool
1099-DA Record Complexity Check
This check categorizes the complexity of your record trail. It does not predict an audit, calculate missing basis, estimate tax owed or determine whether the form is correct.
Four different questions
Identify what does not match before trying to fix it.
Purchase history is absent
Locate when, where and for how much the asset was acquired, including relevant fees.
The trail breaks between wallets
Match the outgoing transaction from one platform with the incoming transaction on another.
Software treats activity differently
Review swaps, rewards, fees, transfers and imports rather than assuming either output is automatically correct.
The issuer record appears incorrect
Document the specific difference and supporting evidence before contacting the issuer.
The history remains unresolved
Organize the evidence for a CPA, Enrolled Agent or tax attorney experienced with digital assets.
Platform-specific guidance
Use one authority library—not six separate mini-sites.
Coinbase
Coinbase 1099-DA record review
Separate proceeds questions from transferred-asset basis gaps and identify the records to export.
KrakenKraken cost-basis trail
Review combined tax documents, account history and assets acquired somewhere else.
RobinhoodRobinhood Crypto record review
Compare tax-center data, external transfers and the original acquisition trail.
MetaMask
Self-custody transfer reconstruction
Use wallet addresses and transaction hashes to reconnect transfers, swaps and bridges.
Binance.USBinance.US record review
Distinguish exchange exports from records held on international or self-custody platforms.
Free toolMismatch letter builder
Organize a specific discrepancy for issuer support or professional review without claiming the form is automatically wrong.
Choose the next step by complexity
Records first. Software or professional advice when warranted.
- Simple history: use the free checklist and official broker exports.
- Multiple exchanges: compare transfers and acquisition history before importing conclusions.
- DeFi or many wallets: reconciliation software may reduce manual work.
- Dispute or unresolved tax treatment: consult a qualified professional.
Practical resources
Gather the evidence before escalating.
The paid guide is an educational record-organization walkthrough. It does not prepare your return, calculate tax, prove a form is wrong or replace advice from a qualified professional.
Frequently asked questions
Before relying on the result
Does missing cost basis mean my Form 1099-DA is wrong?
No. It may mean the broker did not have the original acquisition history. Compare the form with your records and contact the issuer or a qualified professional when appropriate.
Does this check determine my tax liability?
No. It categorizes record complexity only. It does not calculate tax, prepare a return, predict an audit or determine whether a form is correct.
What records should I gather?
Gather broker and exchange exports, wallet addresses and transaction hashes, original acquisition records, transfer matches, fees and relevant tax-software reports.
Who can review an unresolved issue?
A CPA, Enrolled Agent or tax attorney with relevant digital-asset experience may be appropriate depending on the issue. This site does not provide individual professional advice.