Next choose the time that you want the car. If this is for a departure use the time you want us to pick you up. If this is an arrival use the time that the plane is scheduled to arrive. Next choose how many extra stops there will be in addition to the drop off stop. The drop off location is not considered an extra stop.
Extra stops are additional stops along the way to the drop off location.
Finally on arrivals you will need to determine what protocol you would like to use for an arrival. If this is a departure you can skip this. These numbers have tax, license, bridge and tip figured in. No Checked Luggage in 10 min.