Self-employed: Prior year depreciaton for automobile

I've been using TT Home and Biz for umpteen years now. I am self employed and working on the deduction for my 2019 car (which I do use for my business). This year I had to put all the info on the car from scratch (dig out the paperwork) which is one problem - why did it not carry through from previous years? 

 

I am also stuck on prior year depreciation for this car. Since TT isn't importing it (along with all the other info it did import) where do I find this on last year's return? I've been looking at the return itself and found Form 3885A,  Form 4562, as well as line 28 on last year's 1099. Does one of these items contain my prior year depreciation?

 

Also, if I switch from using Actual Expenses one year, to the Standard Mileage Rate the next (or vice versa) does this cause a problem of any kind? A red flag?

 

Please let me know if you need more info from me to answer these questions, thank you in advance.