Turbo Tax Review says my vehicle depreciation allowed or allowable is too large on a car that was sold.

Turbo Tax Review says my "vehicle depreciation allowed or allowable is too large".  Sold the vehicle in July 2020 after using it 6 years for business.  I have no idea what or where to make changes.  Looking at the form  (Car and Truck Expense worksheet)  doesn't help as the line in red isn't something I can edit. (line 51)

Also, did some prep work on the car in the process of getting ready to sell.  Could that be a cost of sale expense instead of the normal business expense for the car?  (Oil change, smog check, and a couple of maintenance items).