i am not a tax expert but I don't think this is correct. I sold my car in 2019, was using standard mileage deduction. As I was going through TurboTax, I realized that there is a depreciation component within the standard mileage deduction factor (I think it's 0.25 out of 0.575) and when you sell the car, you have to calculate your gain or loss and pay tax accordingly. Check with your tax person/ SW.