Encountered the same issue too. Was able to efile Federal and PA state returns, but NY non-residential return did not go through. TurboTax never promoted for any file attachment prior to efiling transmit button.
Called TurboTax twice, gone through the automated voice hell, the first customer service lady dropped the call after a few minutes, the second one seemed to work at home with kids crying in the background and computer screen frozen, so she dropped my call as well.
I am going to mail it in tomorrow. Anyone has a more robust software to recommend for next year?
