If you have already filed a North Carolina non-resident return and neglected to include your withholding, then yes, you will need to amend your NC return. However, if you never filed a NC return, then there is nothing to amend. Instead, as @HelenC12 suggests, file a non-resident NC return and include your withholding.
From your post, it appears you have already filed your returns and those returns have been accepted. Thus, you are now ready to amend. Therefore, you can access your previously filed return, in TurboTax online, from the TurboTax home page. Scroll down the screen to the section Your tax return & documents. Click on the drop-down arrow and select Amend (change) 2022 return. If you used TurboTax CD/download, then you can amend your previously filed return by selecting Other Tax Situations, and then scroll down to Other Tax Forms.
@jarrod-cribbs
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