In Worcestershire we got sent a pack and there were posters everywhere (library, children's centre, doctors, nursery etc) telling you what to do. Your local schools will be setting up open days for October / November time when you can go and look around and ask lots of questions. I'd really recommend doing that because it completely changed our minds on what school we wanted to send Alex to. When you've made your choices you register and apply online, the deadline for us was January but I'd check what it is where you are, the info is normally all on your local council website x