After you file

I need to change my 1065 and K-1's (already filed) & it is still before the March-15 deadline.  I filed the original via paper hard-copy.  My research suggests that it is preferable to file a "superseded Return" (rather than an amended return), but I cannot find explicit instructions on how to do so.  From what I have been able to discern, it sounds like I can print out the revised return and Write/Type "Superseded Return" on P-1 of the 1065 and also on Each K-1.  I believe I probably do not check the "Amended K-1" box.

 

Can anyone confirm that this procedure is correct?