TurboTax may have generated Form 8606 for you when you entered your distribution info. Check your copy of your return to verify this.
If so, you won't need to Amend your Return.
Click this link for more info on Form 8606, including how to trigger the form if you didn't enter any non-deductible contributions in your return this year and do need to amend.
Since you have already filed, click this link for instructions on How to Amend your 2020 Return.
Understandable about the covid nerves!
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