Hello, Cabartee.
QuickBooks is a great accounting software that is primarily designed for small businesses.
QuickBooks Online (QBO) is explicitly designed to accommodate the transactional needs of small businesses. Its features and functionalities are tailored to support the seamless management of day-to-day financial activities, including invoicing, expense tracking, bank reconciliations, and financial reporting.
While QBO can support multiple businesses under one account, each subscription is meant for only one business. If you have two businesses with separate Employer Identification Numbers (EINs), then you would need to add another company file or plans to your subscription.
Furthermore, you can check this article to learn how to record, edit, and delete expenses in QuickBooks Online: Enter and manage expenses in QuickBooks Online
If you have further questions about tracking more than business in QBO. The Community is always available if you need help anytime. Take care.