According to the TurboTax Amend 2018, that is true with every state except for New York. Step 2 on the page before the one I am stuck on says "Returns (other than NY) must be mailed." Step 3 is "e-File your amended NY return." So if it does have to be mailed in, the program hasn't been updated to show this change and could very well be part of the problem I am running into.
Thanks!
