Projects in QuickBooks Online should be used to record time and expense. However, if you have converted your system from QuickBooks Desktop, you will not see any projects, and instead will see Sub-customers where you previously recorded time and expense. Although a Sub-customer can be useful to roll up data for reporting and invoicing reasons, you should use a project instead to record time and expense. Fortunately, QuickBooks Online allows you to convert a Sub-customer into a Project.