User wants to charge a client for lesser number of hours than what is actually logged by an employee. How to do that?
You can accomplish this by changing the Client Hours field for the time entry. Core uses this field to calculate the hours and amount charged to a client. By default, it takes the value of actual hours set for the time entry, but you can change it if you want to charge the client more or less than the actual hours worked. Check out these article for details: