@Topsy10 You can only amend 2020 with 2020 TurboTax Premier. If you used TurboTax CD\Desktop to prepare your 2017-2019 returns, you use those programs to amend your prior year returns.
If you used TurboTax Online, you can download and install the amend software and then download your .tax file from the appropriate year to amend your returns. See How to amend (change or correct) a return you already filed.
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