I had the same experience on Sunday, 2/26/2023. Same rejection message. What I found out was that NC K-1 Supplemental Schedule and Schedule NC-K1, Partner's Share of Income, Adjustments, and Credits are unsupported forms for e-File. The forms must be printed and your NC state tax return will have to be printed and mailed in to Raleigh (PO Box R). So I contacted Turbo Tax automated help line and got a link to request a refund for the $20 I paid to e-File my return for NC. The link is https://intuit.me/3KlfqtK . At this refund site, I chose Turbo Tax CD download, then Turbo Tax Desktop, then I chose Intuit as the place I bought it (even though I purchased Turbo Tax Premier from Costco). Then I was asked for my Intuit order #. When I paid for my e-File state ($20) I received a confirmation of my Order Details. In the upper right of the page is the Order Number. I filled that order # into the refund request form along with my email and Turbo Tax looked up my order and presented the details on my screen. I chose North Carolina and got a dialog box to explain why I was requesting a refund (the e-File did not work). After filling in my name and email address I submitted the request. I got a case number by return email. I couldn't find a way to talk to a real person so I took the long convoluted method.
