A 2021 amended federal tax return cannot be e-filed using the TurboTax personal software.
It would be surprising if the NC state amended return for tax year 2021 can actually be e-filed using TurboTax after October 2022.
See this TurboTax support FAQ for e-filing a federal tax return (this FAQ is currently for tax year 2021) - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/e-file-1040x-amend-return/L9t...
