To create of Overtime Component, go to Payroll Settings >> Salary Components
Enter fields as shown in the below screen shot and click on Save
To input Over Time units, go to Employees menu >> expand Transactions >> under section Leave/Time Management >> click on Over Time link
To update Employee wise overtime details:
Select payout month in Select Month drop down field
Select over time Components from Select Pay drop down field
Search Employee code/name and click on Add
Enter over time units in Total Units, click add and save.
To import OT units in bulk
Click on Import button
Generate sample excel template
Input the data in the template and save it in the local drive
Browse & select file and import the same.