<p>I'm trying to register late for the May SAT exam, yet collegeboard isn't letting me apply the fee waiver. Does anyone know why I am unable to apply the fee waiver?</p>
<p>Did you check the fee waiver box?</p>
<p>You can’t use a fee waiver to late register for the test (the regular registration deadline was March 31). You can still use the waiver to register for the June test, though (the deadline is May 5).</p>