I just tried it on a test 2018 tax return...
Had a $6000 credit for solar panels ($30,000 install), and a $2500 Credit for a Chevy Volt.
For a $3173 tax, the software applied the $2500 E-car credit first, and then used $673 of the Solar and carried $5327 to next year on the form 5695 line 16.
I just entered the info....the software applies the credits in the proper order.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
