Hello there, @ch4430. Thank you for posting in the Community. We're happy to assist you today with your concern about managing unassigned shifts in QuickBooks Time.
We understand the importance of managing shifts in our program. If you need to change or delete a shift, click the Edit icon when clicking the unassigned shift. However, you'll need to make sure you're the admin or access to manage shifts in the company file. If you're the admin, you can simply delete the unassigned shift.