J.P.
A.,
Assuming you are in LAUSD... here is a link to locate your neighborhood school, then you can contact them to find out about enrollment.
http://search.lausd.k12.ca.us/cgi-bin/fccgi.exe?w3exec=sc...
I also recommend you check out http://www.greatschools.net/ to see how your neighborhood school rates. You do have choices and it is possible to go to another/better public school also if necessary. Our neighborhood school is not very good but I got my daughter into Encino Elementary and it is much better there.
Good luck!
J.