reporting-compliance

A formal procedure for requesting a correction to a previously filed tax return after the original filing deadline has passed, typically used to fix calculation errors, add omitted income, or retroactively adjust a previously taken conservative position once official guidance is updated — the key supporting mechanism that makes a <a href="/en/glossary/strategy-and-tools/conservative-tax-position/">Conservative Tax Position</a> strategy viable.

The U.S. IRS form used to report the sale or disposition of capital assets, including cryptocurrency, requiring a transaction-by-transaction listing of acquisition date, sale date, cost basis, and proceeds — the core document for calculating capital gains tax.

An international standard led by the OECD requiring crypto-asset service providers to collect user transaction data and automatically exchange it among participating countries — currently the broadest cross-border crypto tax information exchange mechanism, with the EU's DAC8 serving as its legal implementation within the EU.

A tax residency declaration provided to an exchange or crypto service isn't a static document that stays valid forever once filled in — it's an ongoing obligation requiring proactive updates as actual residency status changes (such as relocating, a change in long-term residence), and platforms typically won't automatically detect and update this information.

A document CASPs require users to complete in response to cross-border reporting mechanisms like CARF and DAC8, containing the user's self-declared tax residency and related identification numbers — the core tool for a service provider's due diligence obligation, where the accuracy of what's filled in directly determines which country's tax authority the data gets transmitted to.

For the same piece of unreported income, whether a favorable path like a <a href="/en/glossary/reporting-compliance/voluntary-disclosure-program/">Voluntary Disclosure Program</a> can ultimately apply doesn't hinge on the income's own nature or amount — it hinges on one precise dividing line in time: whether a tax authority has already begun any form of investigation. Once this dividing line is crossed, even if the taxpayer subsequently proactively contacts the tax authority to come clean, this is typically no longer treated as voluntary disclosure — it gets classified as cooperating with an investigation instead, and the two can carry a significant gap in penalties and subsequent handling.

A formal mechanism some jurisdictions have established, letting a taxpayer with past unreported income apply to catch up on reporting and pay owed tax before a tax authority discovers it independently, typically in exchange for reduced penalties — the most concrete institutionalized expression of the difference between voluntary disclosure and being caught passively.