I just efiled and did not get any error message. Maybe because I did not put my IT-242 in that "other PDF" box but instead in the box for the supported form, in effect "borrowing" that box in order to get my otherwise unsupported form to be attached? I agree - better to file without the form than to do paper filing just because TurboTax annoyingly would not allow that attachment. If and when New York asks for the missing form it would be easy to provide. Before I figured out my possible and hopefully successful workaround I looked but did not find an easy way to submit that single form to New York separately. After filing today I gave my TurboTax review and complained about this problem, also difficulty I had with several unsuccessful attempts to get ItsDeductible charitable contribution information to transfer in, which I finally succeeded to do on a last attempt before I filed, to avoid having to fill in all that information manually.
