In order to claim the credit you will need either a QMID code. You cannot claim the credit for 2025 if you do not have it. This comes from the manufacturer, if they are not participating, you would not be able to claim the credit on their windows.
Qualified manufacturer identification numbers. Beginning January 1, 2025, if you are claiming the energy efficient home improvement credit for specified property placed into service in 2025, you must include the four-character alphanumeric unique qualified manufacturer identification number (QMID) for each item
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