Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
I'm not sure what kind of test page you want. If you wish to test the printout function, running a single-page original through it to Copy it, would test that (as well as the scanning function.)
However, to test the fax function, try calling the HP Fax Test number, sending them a one page plain paper fax in black-and-white.
Within 5 minutes, the system should fax you back a 'reply fax', thus testing both sending and receiving.
The number is ***** or 1-***-***-****
Let me know how it goes, please. Thanks.