Try this. It is letter size.
Are you certain you are using Letter sized paper and not A4?
TNT2Planker wrote:the bottom line is cut in half still showing a huge blank at the bottom of the page.
Are you saying it looks like this, where the X should go to the bottom?

- Clipboard01.gif (3.43 KiB) Viewed 538 times
If so, that is very strange. W10 update has a habit of corrupting printer drivers so download the correct driver from the manufacturer's web site and install it.