You may find that the figures that you have in Payroll > Previous Payroll doesn’t confirm with what you may want to pay the employees or you were just trying running the payroll, that brings a need to cancel the payroll and restart the process. On the list in this page:
Click the menu "Payroll"
Click "Previous payroll"
Click on "Action button"
Click on "Cancel". This action will remove the payroll batch and the associated payrolls. Also it reverse salary advance, deductions and allowances so that it does not affect the next run.