Open "Pick list setup" in SETTINGS, and click on "Salary types".
Here you create and control all your salary types, such as allowances, bonuses, deductions, etc.
Press "NEW" and add the name of the new type of salary
Choose parent if this salary should belong to the group. or leave it empty if your salary type should be a parent.
Choose kind of transaction to set the accounts that your transaction will affect.
Use search - start typing the name of kind to find it faster
Choose if its deduction( - ) or addition ( + )
Mark the checkbox "basic" if the salary should be count as basic
Mark the checkbox "by_day" if the salary should be count only by working days of employee