- Open the Time and Billing tab in the service 
 activity record. 
How? 
            
            
                
                    - In the Home window, click Inventory & Services on the navigation pane.
 
                    - In the Tasks pane, right-click  the Inventory & Services icon and select Modify Inventory & Services from the menu.
 
                    - Select an item from the list and click OK.
 
                    - Click the Time & Billing tab.
 
                
            
            
                - Select an option from The service activity 
 is list:
 
                - Billable. An activity you charge a customer.
 
                - Non-Billable. 
 Cannot be added to an invoice (free to the customer)
 
                - No 
 Charge. Can be added to the invoice, but no amount is calculated 
 for the activity.
 
            
            
                - (Optional) Select 
 Sometimes charge for this activity if you 
 want to have the option to change the billable status of an activity when 
 you are recording it on a time slip (Non-Billable and No Charge records 
 only). If you turn this option on, make sure you set up a method to charge 
 for the activity.
 
            
            Note: Internal activities 
 are always Non-Billable. For example, you may want to set up an activity for Administration or Sales Calls as activities, then you can track the time spent on these activities and compare to billable hours.