There's actually another issue with PDF editing; the PDF is not the "meat" of the e-filing, there is an XML file that contains the actual data that is transmitted (the particular format is called MeF which I believe is an IRS originated schema). I believe the PDF you end up seeing is just an easy to read formatted version of the data. While in theory editing an XML file is trivial if you know the schema (XML files are generally reasonably human readable types of file), I don't believe TurboTax allows you access to this part. NYS does allow PDF attachments of supporting documents during e-file but as far as I can tell they no longer allow PDF attachments of actual forms to be filed. So yes, if TurboTax doesn't support the form for NYS, you have to paper/mail file (there are actually certain forms that they list as non-supported by TurbotTax and tell you this explicitly... mostly stuff that the average individual probably won't file).
