"How do I show in Turbo Tax Business software that I traded a vehicle for another?"
Effective January 1, 2018, exchanges of machinery, equipment, vehicles,
artwork, collectibles, patents and other intellectual property and
intangible business assets generally do not qualify for non-recognition
of gain or loss as like-kind exchanges.
Essentially, you have a tax recognition event on the sale and a new asset to depreciate on the purchase.
See https://www.irs.gov/businesses/small-businesses-self-employed/like-kind-exchanges-real-estate-tax-ti...
