Can I fax invoices or other forms directly from QuickBooks?
QuickBooks does not support in-product fax capabilities, however, there are third party applications that allow for this feature. Please visit QuickBooks Solutions Marketplace for a list of third party developers that may have the solution you are looking for. Other results can be found by searching the Internet.
Most common fax software applications will install a fax printer driver that allows you to handle faxing as if you were printing the transaction.