If an employee has completed a year but no annual leave is showing, or the days they have taken appear as a negative balance, the most common cause is that their seniority has not been entered.
Entitlements are not calculated until seniority is set. When you add a new employee, their seniority needs to be defined as well.
To add seniority
Go to Employee > Employees in the left-hand menu.
Open the three-dot menu to the right of the employee and go to Edit Personal Information.
Add the employee's seniority under Seniority.
Once seniority is added, entitlements are calculated and appear in the employee's leave balance.
To raise an entitlement manually
Open Leave Entitlements in the same menu and use the Add Bonus Leave button at the bottom right to grant extra days.