Before realizing that Form 1040X would not be available until March 25, 2021, I proceeded with making changes to a copy of the returns (Fed & CA) that I had filed and had been accepted. When the 1040X becomes available will I have to repeat the process of making the needed changes or will these changes be incorporated into the 1040X automatically? Will there be additional steps I have to take such as providing explanation of the amendments?
