Here's some information from the SAT site about the college application fee waivers:
Apply to College for Free
If you apply to more than one or
two colleges – and you should! – the application fees can really add up.
For eligible students, the College Board is providing four college
application fee waivers. Many four-year and two-year colleges accept
application waivers – view a list of schools that participate in the college application fee waiver process, or use our online search tool.
If you registered for the SAT with a fee waiver, then you’re
automatically eligible to receive the college application fee waivers.
To learn more about college application fee waivers – details about
eligibility requirements, how to use fee waivers with the Common App,
and more – check out our college application fee waiver FAQs.College Application Fee Waiver FAQs
Beginning
in the 2014-15 academic year, every income-eligible senior who takes
the SAT or SAT Subject Test using a fee waiver will receive four college
application fee waivers from the College Board. These waivers will be
delivered online to eligible students starting in late August. Below are
some frequently asked questions about college application fee waivers.
You will be asked on the application whether your financial circumstances qualify you for a fee waiver; if you received an SAT fee waiver, you should indicate that in response to this question. Your high school counselor will be asked to verify your eligibility.
In addition, some colleges may also ask you to enter the unique code found on your fee waiver, or upload an electronic copy of your fee waiver. There is no need to send a hard copy of your fee waiver unless you are instructed to do so.
It is important to note that this process is unique to Common Application colleges and does not extend to other institutions. You may use up to four of these college application fee waivers with colleges who do not participate in the Common Application.
Why did I receive college application fee waivers?
The College Board distributes college application fee waivers to make the college application process more affordable for eligible students. If you previously registered for and took the SAT® or one of the SAT Subject Tests™ using a fee waiver, you are automatically eligible to receive four college application fee waivers.I have registered and taken the SAT using a fee waiver. When can I expect to receive my college application fee waivers?
If you are a senior and eligible for college application fee waivers, you will receive them when you get your SAT score. If you are a junior and eligible, you will receive them in the fall of your senior year. In the meantime, search for colleges that accept application fee waivers.If I am applying to colleges using the Common Application, can I still use these fee waivers?
The Common Application has a specific process for students who apply using a fee waiver. If you have received (or are eligible to receive) an SAT fee waiver, you may apply to any Common App college without a fee.You will be asked on the application whether your financial circumstances qualify you for a fee waiver; if you received an SAT fee waiver, you should indicate that in response to this question. Your high school counselor will be asked to verify your eligibility.
In addition, some colleges may also ask you to enter the unique code found on your fee waiver, or upload an electronic copy of your fee waiver. There is no need to send a hard copy of your fee waiver unless you are instructed to do so.
It is important to note that this process is unique to Common Application colleges and does not extend to other institutions. You may use up to four of these college application fee waivers with colleges who do not participate in the Common Application.