It works fine for me with a new 2023Tesla, I havent had anyone with a used one yet, so Im not sure how that works.   

I even tried it on a dummy return with no make model or VIN just punching in the year and checking the boxes it flows to the 8936 Line 13 and  to Sch 3 just fine for me

Maybe delete the 8936 and 8936A forms and start over from scratch?