You can add billing adjustment item to a managed services engagement. This task can
            only be completed at the engagement level, and cannot be completed on the
                Billing page.Note: You must associate an invoice option with
                the engagement to add billing items. You can also associate a default invoice option
                for managed services engagements at the client organization level.
        - 
                Navigate to the Home page of the
                        MSP view.
            
 - 
                Select the request type by clicking the type button (or
                        ALL).
                
You can also enter the request number in the search field.
             - 
                Select the request by clicking the number link in the
                        Request column.
            
 - 
                Click the Billing tab.
            
 - 
                Click 
.
             - 
                From the Billing Type drop down, select the billing type
                    (Adjustment or Benefit).
            
 - 
                From the Date Range drop down, select the range to apply
                    the billing item to.
            
 - 
                Optional, enter a date in the Date Other field. You can also click the calendar icon to open
            a calendar pop up that allows you to select the date.
            
 - 
                Click 
.