To edit a service:
From the Applications menu, click Product Management > Product Catalog. This displays the Product Catalog window.
Click on the folder that contains the service you want to modify. This displays the contents of the folder in the upper right-hand portion of the Product Catalog window.
Right-click on the desired service in the upper right-hand portion of the Product Catalog window and select Edit. This displays the Edit Service window.

Enter the Service Details as required.
Note:
If the service tax class specified is either "Local" or "VOIP," the Per-Line Tax Configuration tab is displayed. See Adding New Services, Adding New Services or Per-Line Tax Configuration for additional information.
Click Save.
See also:
Setting Up Equal Access Service
Tax-related Topics for Services