Deductions can be configured and created for employees by doing the following:
1. Create a new deduction category under Configuration > Payroll (example: salary in advance)
2. Go to the Requests tab under Payroll and select New Deduction
3. Fill in the deduction details for an employee by inserting the amount to be deducted for that particular month (amount to be manually calculated)
The deduction will be reflected in the employee's payroll for that month as shown below as well as in the payroll table.