Either on the Time Tracking tab of a constituent's record or on the main Time Tracking dashboard you will find a green “Add Service” button. Clicking on this Button will open a dialog window to enter your Time Tracking record.
On the dialog you will be able to enter the Constituent's name if it is not already filled in. Then you can enter the start and end time and date of their service. You can also select an event location at which the service occurred. Finally there is a comment box for your comments. Your last option is whether you want the hours to be tracked for an Event.