Sold a vehicle used partially in business (about 60% biz, 40% personal) in March 2016. Not sure about reporting, not exactly a sale, not exactly "like trade", etc.

[Coleen3]

If you sold the vehicle to anyone and received cash or other compensation you have a sale. If your traded it in to a dealer for another car, you have an exchange. 

Report the sale as a sale, recording original purchase price, depreciation taken and sales price. If it is a trade-in, follow that set of instructions.

Trade-in. When you trade in an old car for a new one, the transaction is considered a like-kind exchange. Generally, no gain or loss is recognized. (For exceptions, see chapter 1 of Pub. 544.) In a trade-in situation, your basis in the new property is generally your adjusted basis in the old property plus any additional amount you pay. (Pre-TCJA rules)

For additional information (including how to figure depreciation suing the satandard mileage method, see the link below at IRS.gov. Disposition of a vehicle starts on pages 19-24.

https://www.irs.gov/pub/irs-pdf/p463.pdf

Also the below link at Turbotax may be helpful.

https://turbotax.intuit.com/tax-tools/tax-tips/Small-Business-Taxes/Business-Use-of-Vehicles/INF1207...

[jMadduxCPA]

This is actually no longer true.  When you trade-in a vehicle it is considered a disposition of that car and you must report the gain or loss.  Like-Kind exchanges were no longer available for personal property (not real-estate and a few exceptions) when performed after December 31, 2017.