Thanks for the reply.
The refund is $5000/new EV that qualifies.. I.e. Tesla Model Y for me.
I will end up sending a hard copy in for my CO taxes in instead of electronic since TurboTax is lacking the ability to have more than one car. This is highly disappointing that such a basic feature is missing.
What I found I can do, is override the credit from $5000 to $10000, fill out the form for each car and print them out separately. TT does do the correct calculations once I do the override.
