You can add bonus when the payroll is in draft status.
- Go to Payroll> Payroll Summary> Select month
- Choose the employee to whom you want add the Bonus allowance by clicking on the "Edit" icon.
- In the Payroll popup, under allowance section click '+' icon.
- Select the 'Bonus' allowance from the list and press enter.
- Click on the "Save" button to save the changes.