Fax From Your PC

First, install the FAX driver which can be found here.
Install it like you would a printer, using the IP address, only choose the FAX driver when you select the driver to use.
Canon iR 1024/1025 FAX (US)

In your document (Google Docs) click the print icon and select “Print Using System Dialog” at the bottom.
*If you don't have Cloud Print enabled, skip to the next step.

Select the Buisness Office FAX and click Preferences.

On the Preferences tab, enter the name and fax number of the destination if you are sending to a new location. Click Add to Destination List and click OK. Alternatively, you can choose a destination from the address book and click OK.

You will be taken back to the main print window.  Simply click Print to send your fax.