UCSD Waitlist letter

UCSD is my 1st choice school and I’m waitlisted. Am I allow send a waitlist letter of continued interest to their admission office providing more information like my senior grades? I am also going to talk with my guidance counselor about what I can do to improve my chance accepting off the waitlist. Thanks!

PS: OOS

If they don’t ask for it, don’t send it. They likely won’t read it anyway if they don’t ask.