Deduct in 2025. The tax credit can be taken in the year the windows are “placed in service” (installed) – not the date of your purchase.
IRS - Home energy tax credits
For 2025...
Entering Energy Home Improvements:
- Open your return (if not already open).
- Enter "energy improvements" in the Search box.
- Click on "Jump to energy improvements" link.
- Enter "Yes" to the question, "Did you make any energy efficient improvements in 2025 or have a carryforward from 2024?". Click on Continue.
- Enter energy improvements information, and Continue.
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