Dropped a course, when to report?

dominicfhk
Tue, 12 Apr 2011 20:57:08 +0000

I am about to drop a prereq class for my major because I will most likely fail the class. Should I report the W now by email, or should I wait until I get my acceptance letter? I applied to UCSD and UCLA. Also will I be given a chance to explain why I dropped the class?

Thank you!!