When viewing a customers account, along the customer menu bar click on the tab called 'History'
Once the History screen opens next expand the 'Daycare Credits' panel
And once expanded click on the 'Modify Credits' button.
In the popup window enter the required information, the reason for the adjustment, the type of credit being adjusted (Full Day, Half Day, or Hourly, and either a positive number '2' if adding credits or a negative number of removing credit '-1').
Once added their the change will be reflected in the balance of credits on their account.