Go to Global Settings > Time Tracking > Reporting Hours.
Select Company, Group, or Employee.
Enter a rule name and make any other applicable selections.
Under Employee Reporting Method, select Manual Clock In/Out to allow employees to add Clock In/Out times and Manual Timesheet Hours to allow employees to add timesheet hours.
Click Save.
IMPORTANT: Allowing employees to approve their own timesheets also depends on edit access and whether an approval workflow is configured. If no workflow exists, employees with edit access can approve their own timesheets. If a workflow exists, approval behavior follows the workflow configuration.