What changed in 2025:
- Form 1099-DA started for 2025 transactions (gross proceeds only). Basis reporting for covered assets starts with 2026 transactions.
- Safe-harbor (Rev. Proc. 2024-28): You may allocate unused basis to wallets/accounts as of Jan 1, 2025 to end "universal basis."
- If you use specific-unit allocation, complete it before the earlier of your first 2025 sale or your 2025 return due date (incl. extension). Keep per-wallet/account records.
