Click on the “Leave Days” tab on the left menu.

On the leave days tab, click on the “Policies” and then select the rule which was assigned to the employees.

Click on the leave type which one you want to set overdrawn balance.

Proceed to the "Entitlement" step.

Choose the overdrawn balance from overdrawn selection menu located on the bottom.

Select the type's other settings from the next steps if you want then, click on the "next" button from top of right and save changes.