"Yes in my post I followed that link. It says to save the file but name it something else. So now that I created a new file for amendment I assume to fix the issue of duplicated SSN I can just remove the e-file option on the original. Is that correct?"
That part in red is wrong.
You want to save a copy of the original (and uncheck the EF boxes on it for both fed and state), but use the actual original file as the amended. You cannot use the copy for the amended return.