Guides
Missing Purchase History in Koinly: What It Actually Means and How to Fix It
Koinly's "missing purchase history" warning means a $0 cost basis and inflated gains. Here's what causes it, how to fix it, and when the fix isn't in the app.
Phantom Gains: Why Your Crypto Tax Tool Shows Profits You Never Made
Crypto phantom gains happen when a transfer erases your cost basis and the whole sale gets taxed as profit. The five causes, and how to check your own report.
Crypto's Per-Wallet Cost Basis Switch: What Rev. Proc. 2024-28 Means for Your 2025 Taxes
On Jan 1, 2025 crypto cost basis went universal to per-wallet under Rev. Proc. 2024-28. What the safe harbor snapshot allocates, how to do it, and what breaks.
Form 1099-DA Box 1g: Why Your Crypto Cost Basis Will Be Blank, Wrong, or Read as Zero
Form 1099-DA reports crypto cost basis in Box 1g — but for self-custody, DeFi, and transferred-in coins it's often blank or wrong. How to fix it.