I was in the process of buying some new windows and slider doors for my home. I stopped short of signing the paper work, because even though they will take 3-4 months to make, I was not sure of one thing. Do the windows and doors qualify for the credit when purchased (2022) or when installed (2023). I would pay half down on signing and the other half after completion of the job. Thank you. I have been looking everywhere for this answer; I even read the relevant parts of the inflation reduction act to no avail.