I am setting up Quickbooks online for the first time for my medical practice in Australia.  

We have a business partnership which receives billings to patients and pays bills like rates and professional costs  and payments to the partners.   We also have a service entity that provides medical supplies, computers, phone and staff, and bills its costs to the partnership.    

Quickbooks online only seems to allow one entity to be set up under 'Account and settings'.    How can we set it up to keep track of both entities?    The two entities report separate BASes and have diffferent ABNs.