In Tax - Calculation, you can choose the tax form and cycle, and system will generate the form based on employee's information, including number of people and total income.
Go to Tax > Calculation > +New
Select the tax form(IR56B/IR56F/IR56E/IR56G) and cycle to calculate
After clicking on OK you will see the draft
Double click this draft, you can view employees' tax report details under this tax form.
Edit Employee's Information to Recalculate
Double click the selected draft
Click on Edit > Click on recalculate