The easiest DIY solution to this is to go to your Vendors and go down to their Mailing Address. Enter a "blank line" above their Name so that it lowers the entire Mailing Address one line and has a blank line now for the top line.
It is a bit time consuming and pretty stupid for a fix that an IT guy at QB could probably fix in a few minutes. But its a heck of a lot better than taping or hunting down weird shaped window envelopes.
