How do I set up fax on the HP OfficeJet Pro 8720?

You can set up fax using the HP printer software (recommended) or from the printer control panel. On Windows, use the Fax Wizard during software installation or open the HP printer software after installation, go to the Fax tab, and select Fax Setup Wizard. On OS X, use Basic Fax Settings from the HP Utility after installation, or touch Fax on the Home screen and then touch Setup from the control panel.