can I efile my 2020 amended return due to TurboTax bug i.e ESPP adjustment

TurboTax send me the email below. I prepared the amendment but it said the efile was closed in Oct. Is efile allowed due to this bug?

 

"Because of an error in a TurboTax calculation, you have reported the cost basis of your Employee Stock Purchase Plan sales incorrectly, resulting in a possible overpayment of your federal tax and, if applicable, your state tax.
We fixed the issue in TurboTax, and we want to make sure your federal and state tax returns are complete and accurate. We recommend that you check and, if necessary, amend your tax returns to determine if any additional refund is due. There are no additional fees for checking your TurboTax return or for preparing an amendment."