No, every tax year is separate. You must amend 2019.
You can amend your 2019 tax return as long as your original return was accepted in TurboTax Online or TurboTax CD/Download. (You can’t amend a return that hasn’t been filed yet.) You'll need to print and mail it, since TurboTax doesn't currently support e-filing an amended 2019 return.
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TurboTax Online
TurboTax CD/Download
