Timesheets can only be edited before they are included in a pay run (unprocessed).
There are two things you can edit in an unprocessed timesheet.
- Change the Payroll Time (P)
- Change from Declined to Approved or vice versa
To change the Payroll Time:
- Go to Timesheets > All Timesheets
- Find the record you wish to edit
- Double tap 'P'
- Change to the desired time