free NY filing not working

I was filling out my federal return and I have lived in NC and then spent 4 months living in NY. As I was wrapping up my federal it said I had to e-file my NY return but that it would be free. I chose not to finish my state at that time. I am ready to do it now and it tells me I need to pay $40.00 and then hangs up. I ha e already paid for the NC state. What is happening?