What you have to do is check in online within 24 hours and it should give you a confirmation and the e-ticket you need to print after. Then on the day of your flight, in the airport, you will have to go to the airlines' desk with "Check In Online" (airlines usually have a separate queue for the ones that has checked in online so ask questions in case you can't see it) and they will give you your boarding pass. The terminal fee and travel tax (PHP 550 + PHP 1620) will have to be paid first when you get to the airport, so just ask where the area for that is. You can go to the airlines' desk first if you want and they will tell you where to go.