Payroll Year End T-4 Electronic Submission

I am getting ready to submit my T4's Electronically and have a question.  I have done my T4 Summary and on the summary I have added "other payments" for various reason so my Difference in the End is Zero.  After you print this form showing all of the details, but how do I save that information so that when I hit "File Electronically Now" that it includes the information that I added/changed on the T4 Summary.  There is no way to electronically send this file while you are in the summary screen and my experience for the last couple of years is that it doesn't include what I put in the "other Payments" box.   So how do I get it to send what I want it to send?