After you file

You can actually complete your amended return using TurboTax and e-file it.   You make the change regarding being claimed as a dependent by changing the way you answer the question in My Info.  You can also enter a sentence about it in the reason for amending on the

https://ttlc.intuit.com/community/tax-return/help/how-do-i-amend-my-2021-return/00/2544441

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