Re: I upgraded heating/cooling system in 2018, but was not able to claim any tax credits since I did not replace windows & doors. This year, I did. Can I claim retroactively?

I upgraded heating/cooling system in 2018, but was not able to claim any tax credits since I did not replace windows & doors. This year, I did. Can I claim retroactively?

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Nonbusiness energy property credit has expired.

The nonbusiness energy property credit expired on December 31, 2017. It has not been renewed by Congress as of this date.

The nonbusiness energy property credit included improvements such as residential exterior doors and windows, insulation, heat pumps, furnaces, central air conditioners, and water heaters.