I purchased a plug-in electric vehicle in 2019 that qualifies for the $7500 refund. I also purchased solar panels for my house spending $27,399 after receiving a state incentive. After the 30% refund, I should be able to get credit for ~$8,220 from solar alone. My problem is that I should be able to get back  $15,720 from both of those, However, my refund is missing ~$4000 because I maxed out the deductions and credits. How do I carry forward that extra money to next year from solar panels to next year? Should I only claim I spent $15,000 this year on solar, and then claim the additional $12,399 on taxes for 2020 as a carryover? It's just unclear how to do that on Turbo tax. Thanks!