If your 1099-DA shows incorrect proceeds, missing cost basis, or other incomplete crypto tax data, this IRS-ready dispute letter template helps you organize the issue clearly before filing or contacting exchange support.
What This 1099-DA Dispute Letter Template Is — And When You Should Use It
This dispute letter template is a structured, tax-compliant document you can send to a cryptocurrency exchange to request corrections to an incorrect or incomplete Form 1099-DA. It is designed specifically for real situations where proceeds, cost basis, or transaction history was reported inaccurately — and where those discrepancies could affect your tax filing.
You should consider using this dispute letter if your 1099-DA contains inaccurate proceeds, incorrect sales dates, missing cost basis, or misreported transaction totals — especially if these errors would materially change your actual taxable gain or loss. Sending a dispute before you file increases your chances of having the exchange correct their reporting to the IRS and to you.
Crypto reporting systems often struggle with transferred assets, multi-exchange trading, decentralized platform activity, and cost basis tracking across wallets. These mismatches can lead to inaccurate 1099-DA data — but the IRS recognizes that brokers can only report what they can track, and that it is the taxpayer’s responsibility to reconcile and correct these figures before filing.
This dispute letter template gives you a professional way to formally request corrections from an exchange to their 1099-DA reporting — including incorrect proceeds, missing cost basis, wrong transaction counts, or inaccurate sale dates. It helps document your concern, reference the exact discrepancies, and prompt the exchange to issue a corrected form before you file your tax return.
To maximize the chance of a successful correction, your dispute letter should clearly state your identity, the specific 1099-DA in question, the exact figures you believe are incorrect (with documentation), a concise explanation of the discrepancy, and a request for a corrected form. Including screenshots or transaction exports strengthens your request and reduces back-and-forth delays.
Before submitting a dispute letter or filing your tax return, you should reconcile all relevant transaction history — including buys, sells, transfers, fees, and cost basis — across all wallets and exchanges. Using exported CSVs or tax software reports helps identify mismatches and provides support documentation for both your correspondence and your return.
Use this dispute letter when: gross proceeds reported don’t match your records; cost basis is missing or inaccurate; transaction counts are incorrect; or transfers are showing up as taxable events incorrectly. These issues are common with multi-platform activity and can materially affect your reported gains or losses.
The IRS requires that you report all taxable cryptocurrency transactions — regardless of whether you receive a 1099-DA or not — and that you calculate gain or loss using actual cost basis. The 1099-DA only reports what exchanges send; it does not calculate your tax liability. Correcting inaccurate forms before filing aligns your return with IRS matching systems and reduces audit risk.
If you discovered an error on your 1099-DA and are panicking because time is short, take these steps immediately: export all transaction history, document the exact mismatch, complete your dispute letter referencing the discrepancy, and submit it to the exchange’s support or tax department. If you cannot get a corrected form before filing, file your return using your reconciled figures with proper documentation and consider a filing extension if needed.
This dispute letter template and guidance are educational tools to help you address reporting discrepancies. Always verify your crypto transaction history using your own exchange and wallet records, and consult a qualified tax professional if your situation is complex. Correct documentation and reporting will help you avoid overpayment and unnecessary IRS notices.
This guide is based on current IRS guidance for digital asset reporting and Form 1099-DA requirements.
Form 1099-DA is the new broker reporting form used to report proceeds from cryptocurrency sales
and exchanges to both taxpayers and the IRS. While exchanges report certain transaction data,
taxpayers are responsible for calculating their own cost basis and reporting accurate gains or losses
on their federal tax return.If discrepancies appear on your 1099-DA, documenting the issue and requesting correction from the
exchange can help ensure your tax filing accurately reflects your transaction history.
Q: Do I have to report crypto gains even if my 1099-DA has errors or missing cost basis?A: Yes — whether or not your 1099-DA shows cost basis or other details, you must report all income, gains, and losses from digital asset transactions on your tax return. The IRS explicitly states that taxpayers are responsible for reporting their gain/loss whether they receive Form 1099-DA or not.Q: Why doesn’t my 1099-DA include cost basis this year?A: For the 2025 tax year, brokers including Coinbase are required to report gross proceeds only on Form 1099-DA — they are not required to report cost basis for those transactions. Cost basis reporting becomes mandatory beginning in 2026 for certain covered digital assets.Q: Can I overpay if I file using the 1099-DA amounts as-is?A: Yes — if you use gross proceeds alone as taxable gain, you could overpay. Form 1099-DA shows what the IRS and you received in proceeds, but your taxable gain is proceeds minus cost basis. If you don’t supply your own cost basis, the IRS may initially treat the basis as zero and overstate your gain.Q: If my 1099-DA has incorrect data, should I wait to file until it’s fixed?A: No. Don’t wait to file. You should reconcile the form with your own records and file using the accurate numbers you’ve verified. If an exchange can correct the form before filing, great — but missing or incorrect cost basis doesn’t stop your obligation to report.Q: What if I never received a 1099-DA from an exchange I used?A: You still must report all taxable crypto transactions even if you didn’t receive a 1099-DA for them. The IRS requires reporting of all digital asset gains/losses regardless of whether a broker issued a form.Q: How should I report accurate gains if the 1099-DA isn’t complete?A: Reconcile your full transaction history (buys, sells, transfers, and cost basis) across all wallets and exchanges, then report your accurate gains/losses on Form 8949 and Schedule D. Do not rely solely on 1099-DA totals.Q: Will future 1099-DAs include cost basis automatically?A: Beginning with the 2026 tax year, brokers will be required to report cost basis for certain “covered” assets — meaning those acquired and disposed of within the same broker. But assets transferred in from other exchanges or wallets may still require you to supply basis manually.
If your 1099-DA is missing cost basis or your transaction totals look incorrect,
rebuilding your crypto transaction history can help identify discrepancies before filing.Rebuild missing cost basis with a crypto tax reconciliation tool
Export complete transaction reports for IRS filing
Identify mismatches between exchanges and wallets.
If you want to quickly estimate whether your reported proceeds may be missing cost basis,
you can use our 1099-DA mismatch calculator below before submitting a dispute.
This website provides educational information about cryptocurrency tax reporting
and Form 1099-DA discrepancies. It does not provide tax, legal, or financial advice.
Always verify your transaction history using your own exchange and wallet records
and consult a qualified tax professional if you have questions about your specific situation.Some links on this page may be affiliate links. If you use them, we may earn a
small commission at no additional cost to you.