"Can all Individual Amended filing types be e-filed?
Only an e-filed Form 1040 can be amended. An original return that was paper filed cannot have an e-filed amended return. The original return must have been e-file through your ProSeries software."

Thanks for the information.

That limitation kills the point of Efiling amended Form 1040-X as you can Only do it on the Original returns that you filed Not on returns that was Efiled by someone else.