Once you file your return, and it is accepted it, you cannot make any changes to it; however, you can amend it. What does it mean to Amend? See the following Help Article:
How do I amend my 2020 TurboTax Online return?
If you determine you need to file an amended return, see the following TurboTax Help Article for instructions:
How do I amend my 2020 TurboTax Online return?
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