In AgencyZoom click the AgencyHR link on the left menu.
​
Next click this hamburger looking icon and select Timesheets from the dropdown menu.

Then you'll select the person you want to edit which will take you to their timesheet.  FYI, it defaults to current week, but you can change the time frame.
​
Next click EDIT to edit an existing shift.  OR, click Add shift to add a missing shift.
​
You will then see the Edit dock on the right side where you can add/edit as you see fit.
​