I have the same problem. I am not a PA resident, so nonresident for the entire year, did not have to file a PA return in 2021 because there was no income from PA, but had income in 2022. I followed the directions and went back to review the PA-40 and all the information is correct and as you pointed out in your response to the original questioner, but still am no allowed to click the box for nonresident. So it keeps showing an error.
