I have a pdf copy.  I can determine the before and after.  I can always lock the return so it doesn't change when I open it. 
YOU MISSED THE POINT.  You can't determine the before and after if you just open a client file.  WHY is the program changing what was previously efiled?  The programmers are altering the original return.  There should have been another way around this change.  I should open the original return, and have a message block appear,  or whatever,  explaining a change may recalculate the return.  It should be an option, not an automatic recalculation when you open it.