Hi there, jason.
As part of our integration, employees and contractors must have at least one customer assigned for billable timesheets. We can create a generic customer, such as "Office Meeting" or "Training," to track time spent in these areas.
For non-billable timesheets, contractors do not need to select a customer. If you have assigned a customer, you can unassign them by unchecking the Assign to All Members box.
Here's how:
- Go to Customer and select a customer.

- Uncheck the Assign to all members and Save.

- Go to My Team and choose your contractor.

- Click Customers, and uncheck the checkbox of the assigned customers.
- Once done, hit Save.
Check out this article for more information: Track and manage QuickBooks Time in QuickBooks Online.
Also, here's an article for your future reference: Approve, unapprove, and reject timesheets for QuickBooks Time.
The community is always open 24/7 if you need further help. Have a great day!