Your 1099-DA is almost certainly not your tax bill
Prior years are visible too
The 1099-DA starts with 2025 sales. The questions it raises point backward to the years the coins were bought, swapped and moved.
Reviewed September 2026.
Why 2022–2024 still matter
Not a threat. A timeline.
Basis comes from those years. Every unit sold in 2025 was acquired at some point. If you claim a 2023 purchase price now, that purchase, and any swaps along the way, belong to a year you already filed or did not file.
You already answered the question. Form 1040 has asked a digital asset question every year since 2019. A “No” in a year with trades is a statement on a signed return.
Records predate the form. Exchanges kept customer data long before 1099-DA, and the IRS has used John Doe summonses to obtain records from exchanges in the past. Transfer-in data on 2025 forms also shows coins that existed before the account received them.
Assessment windows. Generally three years from filing. Six years if more than 25% of gross income was omitted. No limit if no return was filed or in cases of fraud.
What “fix it before the letter” looks like
High-level order. The decisions in the middle belong with a licensed professional.
- List the years with activityAny year with buys, sells, swaps, income or transfers, with the venues used in each.
- Rebuild each year’s ledgerSame process as 2025: histories, transfer matching, income lots, basis evidence.
- Compare to what was filedGains, losses, income and the digital asset answer, year by year. Note the direction and size of each difference.
- Decide the route with a professionalUsually amended returns on Form 1040-X for filed years and late original returns for unfiled years. Losses you missed can matter as much as gains.
- Pay or arrange paymentInterest keeps running on unpaid tax. Payment plans exist.
- Keep the workpapers togetherOne folder per year: exports, ledger, method memo, what was filed. That folder answers most letters.
| Situation | What usually applies | Who to talk to first |
|---|---|---|
| Filed, crypto small and honestly missed | Amended return for the affected year | CPA or enrolled agent |
| Did not file at all for a year | Late original return | CPA or enrolled agent |
| Letter already received for that year | Respond to the letter, do not work around it | CPA, EA or tax attorney, before responding |
| Large amounts, several years, or concern it could look intentional | Legal strategy first, including whether voluntary disclosure applies | Tax attorney, before filing anything |
No workaround is offered here and none should be sought: no backdating, no restated histories, no answering the digital asset question incorrectly. The whole point of fixing prior years is that the records then match reality.
Get the mismatch list
Four things, written and ready. Nothing sits behind this form that is not already on the site.
- Your reporting risk profileLow, Medium or High, with the four specific holes most likely to break your return.
- 1099-DA vs your actual gainLine by line: what each box on the form means and what you reconcile against it.
- Recon templatesExchange, wallet, transfer, missing basis and staking sheets, with sample rows.
- Weekend close-outThe order of operations, Saturday morning to Sunday afternoon.