1099-DA Mismatch Rescue Guide: Fix Missing Cost Basis Before Filing

Crypto gains look too high? Your 1099-DA may be missing cost basis.

This practical guide helps you understand why exchanges sometimes report proceeds without full acquisition history, especially after wallet transfers, multi-platform trading, or self-custody activity.

Inside, you’ll learn how to spot common mismatch risks, check your records before filing, and decide when reconciliation software is the safer option.

You’ll learn:

• What Form 1099-DA actually reports
• Why missing cost basis inflates reported gains
• How wallet transfers and exchange gaps create mismatches
• What to review before filing if the numbers look wrong
• When manual tracking becomes risky
• How to choose the safest next step for reconciliation

Built for crypto holders who want to catch problems before filing — not after.