You'll need to wait until closer to the end of February to do this but form 1040X is usually ready around that time. You'll go to your 2025 tax return and click on the button that says "amend my tax return". When you do that you'll be taken back into your return and you can make any changes that you like. You'll have to enter an explanation of why you're filing an amendment (itemizing deductions will do) and then you can review the returns and decide whether or not to file them.
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