Yes. After you have completed the vehicle questions about the sale and purchase of a new vehicle it looks like you will then have to add the new vehicle. The first section is trying to determine if there is taxable gain and will give you a "cost basis" for your new car.
If you are using the standard mileage rate for all cars, both old and new, then the depreciation figure isn't as important, however you should know how to calculate it because by trading vehicles there is not gain to report because it "transfers" to the new vehicle in a manor of speaking.
For all business miles used there is a portion of the standard mileage rate that is considered depreciation each year. You can use the chart attached to find that rate and use the business miles each year to arrive at the total depreciation figure for your old car (also the AMT depreciation figure).
[Edited: 02.06.2018 | 12:18 PM]