@Critter-3 wrote:
Look at the 2018 auto expenses worksheet for the cumulative amount.
As far as I know, the program does not keep track of the cumulative business miles.
As for the original question, you either need to figure it out or come up with some good estimates.
If this vehicle was used for both business and personal use, TurboTax does not calculate that either and you can't enter the sale in the vehicle section. You need to either manually calculate and enter things, or go to a tax professional. But you still need to figure out (or estimate) the total cumulative business miles and the total cumulative total miles.
