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

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