How to add New Deduction Type?
This step is creating new deduction codes for company but not adjusting to employee's monthly payment.
Go to Admin Management -> Manage Settings -> Deductions
Below image shows the list of deductions which have been created for the company.

To add new, click 'Add New Deduction Type' -> Fill up Deduction Type name and select 'Yes/No' -> Click 'Insert'.

'No' means that this deduction has no effect on cpf contribution. CPF contribution is still based on basic salary.

'Yes' means that CPF contribution will be based on the net amount after deducting this deduction from basic salary.
See also