The PIXMA MG3620 is not a model that supports faxing . This model can't be connected to a phone line, so it can't be used as a fax from your PC or Mac.
You can check separate totals for the number of pages used for color printouts and black and white printouts. These totals include faxes , reports, and lists, in addition to copies and printouts of data from computers.
Start buttons when using the Fax mode to have the printer pick up the phone line. If you wish to manually receive or send faxes, this setting should be enabled.