How to Print Farther Right on an envelope?

[caliexam]

I understand the envelope setting under mailings.
I moved the text box as far to the right as possible as you see in the image below.
But when it prints (the bottom picture below), it is almost an inch from edge.
I need empty boxes in the upper stamp area to direct employees where to put the stamp and make them do it neatly.

Anyone know how to print farther to the right? Any manual solution around this?