non-resident state tax

Hi

I was a resident of NC for the entire year of 2020, I used to live in PA  and moved to NC in July 2019.  my employer -in error-  paid PA state taxes until July 2020 even though I never worked or lived in PA.  As I am filing taxes for 2020, I completed my NC tax return first and then purchased and completed the PA tax return. However when I run the smartcheck it gives me an error on the NC tax return  stating that earned income in PA state cannot be zero. I have changed the income on my PA return and it still gives me the same error, any ideas or thoughts on how to resolve.