To add a message on the employee's payslip, please do as follows:
Go to the Payroll module, Pay Details.
Select the employee, enter the message in the Payslip Message and click Save.
When printing a payslip, select Employee message.
You may also create a pay element eg, ER CPF, using Reimbursement Code Property
Insert this pay element in the employee's pay records, insert a negative amount of the same pay element plus and minus.