The shutters, if they qualify at all, must be installed and paid for by December 31, 2025 in order to claim the credit.
You have to enter the "Qualified Manufacturer Identification Number" (QMID) of the shutters on your tax return in order to claim the credit. That's what Opus 17 referred to as a PIN. You have to get that number from the manufacturer or the seller. If you don't have the QMID you don't get the credit.
I also want to emphasize something that Opus 17 said above. The credit would apply only to the cost of the shutters themselves, not the cost of labor to install them, so you need a receipt that breaks down the cost.
