This isn't actually your question, but unless your vehicle was always 100% business use, TurboTax is NOT set to to assist you to report it, and requires some manual calculations.
And if the vehicle was originally 100% personal then later converted to business use (either partial business or full business), then TurboTax is REALLY, REALLY NOT set up to assist you with properly reporting the sale.
You may consider a tax professional for this year.
