As of today, there are three kinds of applications that students can use further for college. There's the common application, which has about 700 different schools to choose form. There's the coalition for free application access which is also available which has about maybe 350 schools, and thee are schools who have their own individual applications that you can fill out online. Every application should be online, whether it's the common app, the coalition or schools' individual application, they can all be found online.
Before you start doing either of them, or any of them I should say, please make sure it's for the proper year, class of 2020 should be the one you're considering now, but again you can begin the common app now, individual applications will be available later in the summer, and the coalition will be available later as well. Consider starting now one of those three applications so you can gather the information needed to actually apply.