Simpley need two #10 Business envelopes

I have been away from this for too long and I'm getting too old.

I only need two business-class single page letters.

I have been trashing about for at least 1.5 hours, without a hint of how do this. I have done this before, but that was several years (or more) ago. At the moment i am very

I have a basic HP Desktop and a Brother HL 2170 W Printer.

All of the discussions that I have seen overly complicated? What am I mssing?

Can some one help me put my letters in the mail?

Thanks for any thoughts

If you're talking about printing on paper envelopes, your printer's Settings page will have something like:
Preferences -> Layout -> Advanced Settings -> Paper Output -> Paper Size -> Envelope #10

Then check your printer's manual for instructions on the correct paper tray setup. Next you'll have to experiment in Word (or whatever text/word processor you're using). Since envelopes aren't cheap, it's OK to reuse the same one 2-3 times while you're trying to get the text to line up correctly.

It's trial & error the first few times to get the margins and font sizes to look right. Envelopes need a larger than average font size for readability.