币界网报道：CoinLedger reports a 758% surge in U.S. users receiving IRS crypto tax letters over the past 60 days, with CEO David Kemmerer warning this may signal broader enforcement ahead of 2026's 1099-DA reporting requirements. The IRS is sending varying severity notices - from educational Letter 6174 to audit-triggering CP2000 - often targeting investors identified through exchange summonses. Many compliant taxpayers receive letters due to wallet transfer tracking challenges, with Customer Success Manager Ben Yoder noting users' shock at being flagged for minor unreported amounts. While 2026 regulations will automate gain/loss reporting, Trump recently repealed Biden-era rules that would have classified DeFi platforms as brokers. Tax professionals advise documenting transactions and amending returns when necessary, as even accurate filers face scrutiny over cost basis discrepancies.