Form 1099-B field reference
Form 1099-B Box 1c: Date sold or disposed
Form 8949 destination
Column (c) — Date sold or disposed of
Reconcile this field with the rest of the transaction before calculating gain or loss. A Form 1099-B label does not override the official basis, holding-period, or adjustment rules.
Before filing
What to check
- Match the transaction to the broker confirmation.
- Keep trade-date and settlement records.
- Use the Form 8949 convention required for your transaction rather than inventing an abbreviation.