Everybody is under the assumption that what is needed is being sent, but nobody here can say with certainty what is or isn't attached. It would be nice if Intuit would provide a nice little list of what is being packaged up with an e-filed return. Folks have been asking the "what's included" question for as long as Intuit has provided a forum. In response to that question, Intuit has provided us with badges 😕
I know one of the mods addressed this over a month ago and said you don't need to attach anything to an Efiled amended return, everything would be included.
My guess is that it sends the entire filing copy again but includes the 1040X, I cant see it picking and choosing what goes and what doesn't.