I'm self-employed, and both cars were/are primarily for personal use, but occasionally I use them for business-related mileage. I don't see a place to indicate that I traded in my car. The trade-in took place in December, and I haven't yet used the new car for any business-related driving.
If you didn't use the car in 2021 for business you can just report the mileage for the previous vehicle. When you complete your 2022 tax return, you will simply change the vehicle year, make, and model and report the full year of 2022 mileage for business.
Thank you, Alicia. My concern is that Turbotax is asking for the sales price (business portion only) of the old car, what its value was when I started using it for business, etc. (because I have checked "I stopped using this car in 2021."), I'm confused about how to answer these questions as safely as possible, since I'm not sure of many of the numbers. I traded my car in rather than selling it, and the percentage of use for business was 10% at the very most.
You should uncheck the "I stopped using this car in 2021" since you used no other vehicle in 2021 for business purposes.