01The letter says records obtained from crypto designated service providers — the exchanges you used — do not line up with what your tax return declared.02The ATO data-matching protocol confirms that crypto data can be used for compliance activity, but HolderTax has not located a current primary procedure establishing one universal response window for every crypto data-matching letter. Use the date and channel printed on the actual letter.03The current published ATO crypto data-matching protocol covers account and transaction data for the period 2014–15 through 2025–26.
What sits behind the letter
The ATO crypto assets data-matching program obtains identity and transaction data from designated service providers and matches it against tax records for compliance purposes. The current published protocol covers 2014–15 through 2025–26. A letter, prompt or later review must be read on its own terms: the protocol explains the data program, but it does not create one universal response deadline for every communication.
By the time this letter arrives, the ATO is not wondering whether you traded. It is asking why the return says otherwise.
The prefill trap
Where myTax or another ATO communication flags crypto activity, reconcile it before lodging or responding. A prompt is evidence that the ATO holds data; it does not by itself determine the tax outcome. Keep the records that explain why a transaction is taxable, non-taxable, already reported or reported with a different basis/valuation.
What to do before the letter’s response date
- Date the letter, calendar the deadline, and ask for more time early if you need it. Extensions are requested, not assumed — and the request itself signals engagement.
- Pull the records the ATO already has. Export full histories from every platform named and every platform not named — the letter reflects one data set; your reply must survive all of them.
- Rebuild the year in AUD, parcel by parcel. Every disposal — sales, swaps, spends — at market value on the day, against the parcel's cost base, with the discount applied only where the twelve months genuinely ran.
- If the reconstruction shows the return was wrong — stop and read the disclosure page first. A response to this letter and an amendment or voluntary disclosure interact; the order changes the penalty band. Answering "all fine" and amending next month is the worst available sequence.
- Reply in writing, with workings. A documented reconciliation closes the loop. An assurance without numbers extends it.
Separate the data-match question from the tax answer
| What you find | Next evidence task | What not to assume |
|---|---|---|
| ATO data matches your records and return | Keep the reconciliation and respond through the channel/date on the communication if a response is requested. | That the protocol itself sets the letter deadline. |
| ATO data is right but your return omitted/misstated disposals | Rebuild the year and assess amendment/disclosure timing before making inconsistent statements. | That correcting only the named line resolves every affected year. |
| ATO data is incomplete or misclassified | Document transfers, duplicates, wallet ownership, acquisition cost and AUD valuation. | That every exchange transfer is a taxable disposal. |
| Letter says review/audit/examination has begun | Use that status when assessing voluntary-disclosure penalty mechanics. | That a pre-examination reduction remains available on the same terms. |
A transfer can look like activity without being a disposal
If provider data shows crypto leaving Exchange A and arriving in a wallet you control, first determine whether that movement was merely a transfer of your own asset or part of a sale/swap. The data-matching record is a starting point; the tax treatment depends on the underlying transaction and supporting records.
The actual communication controls the procedural step
- The response date and channel printed on the letter/email.
- Whether the ATO communication is a prompt, information request, review or examination notification.
- Whether the data difference is a reporting error, a valuation/basis difference or a non-disposal transfer.
- Whether the same platform/data source affects other years.
If more than one year is wrong
The protocol spans many income years, so a discrepancy can recur. Scope the same data source across the relevant history rather than assuming the named year is the only one affected. If an amendment or voluntary disclosure is being considered, the timing relative to ATO examination contact can affect penalty-reduction mechanics; confirm the status of the actual communication before choosing a route.
If you have received this letter, a response window is running. This page explains the letter; it does not respond to it, and reading it creates no professional relationship.