
CARF edge cases: DeFi front-ends, unhosted wallets, and retail payments
Most CARF questions aren't about the easy 90%. Here's how the framework treats DeFi interfaces, withdrawals to self-custody, and payments for goods.
Practical guides, regulator deep-dives and product updates. Written by people who file crypto returns for a living.

Most CARF questions aren't about the easy 90%. Here's how the framework treats DeFi interfaces, withdrawals to self-custody, and payments for goods.

A CARF filing that fails schema validation bounces. Here are the recurring XML errors, from DocRefId collisions to bad TINs, and how to catch them first.

CARF is the OECD baseline; DAC8 is how the EU implements it. The XML mostly overlaps, but the national envelopes are where filings break.

Point CARF tools file a report and stop. Here's the case for CARF/DAC8, withholding, and a retail tax centre on one data layer, at a fraction of the cost.

There's talk of Germany moving toward withholding on crypto like Austria. Here's what's actually settled today versus what's still discussion.

The UK's 30-day rule recalculates your loss using the repurchase price if you sell and rebuy a token within 30 days. Here's how to harvest losses legally.

A crypto CP2000 usually means the IRS assumed a $0 cost basis on your sales. Here's what the notice is, why it happens, and how to respond.

The PARITY Act dropped the $200 stablecoin exemption for a $1 deemed cost basis and would extend wash sale rules to crypto. Here's what that changes.

From 1 January 2026, UK crypto platforms report your data to HMRC under RCASP, the UK's CARF rollout. Here's what gets reported and how to stay compliant.

Trading crypto across five or more exchanges and wallets wrecks your cost basis at tax time. Here's how to reconcile it all automatically and file audit-ready.

Your Form 1099-DA almost always overstates your crypto gains. Here’s why the number looks so high, and how to report what you actually owe.

Discover how fragmented Historical Crypto Data can increase Compliance Risk in crypto taxes. Learn how Kryptos.io helps investors and crypto startups track wallets, DeFi, NFTs, and cost basis accurately.