Good morning, @karenr1965. 

Allow me to step in and give you some more information to help answer your question about billable rates in QuickBooks Time. 

 I can see how beneficial this would be for your business. Because of how the integration is built, all of the rates are set up in QuickBooks Online (QBO). In QB Time, you're able to mark timesheets as billable through the custom field settings so that they wind up in your invoices, etc. 

I believe this thread from another customer is related to your question. Take a look at some information about billable rates with QBO and QB Time: Employee billable rates. 

I've got your back if there's anything else I can help with QuickBooks. I want to make sure you're all set. Keep safe!