Congratulations on your new car! The fuel door on the 2016 Ford Focus is located on the vehicle’s passenger side, directly under the rear headlight. To open it, all you have to do is gently push in on the small circular indent at the left side of the fuel door, then move your hand away and allow it to pop open.
Keep in mind that the fuel door on the 2016 Focus will not open while the car is running, so make sure your vehicle is in park and turned off before you try to open it.