Please try this option to delete the form 1099-INT:
- Login to your TurboTax Account
- Click “Take Me To My Return”
- Click on the Search box and type “1099INT”.
- Click on “Jump to 1099INT”.
- Click on “Delete/Trash icon” next to the 1099INT you wish to delete.
If it doesn't work entering the value $0 should be ok.