To show the details of overtime taken by an employee on the respective employee’s payslip, you first need to disable Grouped Overtime Hours in the payroll calculation settings page.
To disable Grouped Overtime Hours:
Go to Payroll and Leave > Main > Settings.
Click on Payroll, and then Calculation Settings in the left sidebar.
Click on Edit (pen icon) in the functions bar.
Untick the option for 'Show grouped overtime hours in payslip' to disable this setting.
Detailed overtime calculations will now appear on employees' payslips.