Most schools already sent them to accepted applicants. If you are waitlisted, only a few will generate a "estimate" award letter. If your application was in on time, you might want to call the FAO and ask right away. If they send you an offer and you don't respond by thier deadline, you might lose any school grants ( if their funds are limited).
Hope this helps. If you have specific questions, if you post them I will try to reply quickly with answers.