If you have an issue where an employee's leave balances have not updated or are not correct because the leave tables on the employee Masterfile were not originally set up correctly, you can do the following to update the balances:
Use the Pay Totals History report (Payroll, Reports, History, Pay Totals) to see how many hours the employee has worked since starting or becoming eligible for leave. In the Date Range fields in the report, enter the date range from when they started to the current date.
Alternately use the Leave calculator on the Fairwork website: https://calculate.fairwork.gov.au/Leave.
Manually enter the leave balance onto the Leave details page of the Employee Masterfile. First select the leave code on the line then manually enter the balance in the correct field. See: Adjust leave entitlement balances for an employee.