...
The Charges tab provides the User access to manually control how each Service is Billedbilled. There are four functions that can be used to control these Charges: Add, Edit, Delete, and Stop. If Users should not you do not want users to modify Charges outside of Service Desk, the Configuration Option configuration option MODIFY_CHARGES_WITHOUT_SERVICE_DESK must be set to false.to modify "permissions" on how Charges can be managed.
MODIFY_CHARGES_WITHOUT_SERVICE_DESK defaults to ADMINISTRATIVE_USERS. What this means is that non-Admin Users can only Stop and Start Charges through a Service Desk Item, usually a Service Desk Action. If this configuration is changed to ALL_USERS by PCR at the Customer’s request, then any User with access to that form can Stop and Start charges directly on the service. This is often desirable for quick “record-keeping” type updates. At this point, the Admins can still remove access to the Add, Delete, and Stop buttons via system security if desired.
Add
After clicking the 
button, the Add New Service Charges form opens.
...
From here, the User can select the Charge Catalog and an Override GLA if so desired. The Charge Amount auto fills based on the Default Amount from the given Charge Catalog. Sometimes there is an option for a Charge Override Amount based on the Charge Catalog. A Description is highly recommended for tracking purposes. The Description will be used on the View Bill report for each given Charge. The User can select to prorate the Charges or not based on Billing needs.
...