It is possible that your 2024 tax return shows no tax liability to apply the Credit to. So, if your Federal tax assessed is already a zero, then there is nothing to apply the credit to, and it carries over to next year.
Of course, that could change if you haven't entered all your income into your tax return file yet.
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Note: It may not be your situation, but those with Self-Employment income cannot reduce their SS and Medicare taxes with the solar credit.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
