Ok, so then nothing about the TurboTax product feature set really changed recently. What I wrote in my original message is the general rule:
" or does TurboTax really stop e-filing amended returns after October of the following year?"
This is a shame, and a very inconvenient limitation (my issue wasn't even apparent UNTIL I was doing the next year's taxes and did a comparison) but I appreciate the help from you folks.
