It is possible that you had entered a form 1099-B in a prior year return and that migrated to this year's return in TurboTax. It would only contain identification data but no actual figures.
Be sure to verify the information in TurboTax when you get your current year form to enter. If it doesn't apply to the current tax year you can delete it while going through your step-by-step interview or using the "Delete A Form" function.
1. Select "Tax Tools" in the left hand menu
2. Select "Tools"
3. Select "Delete a Form"
4. Find the 1099-B and/or any other income form that doesn't apply
5. "Delete"
6. "Confirm Deletion"