Undeclared Major

I’m a high school senior and the major I requested was impacted so CSUF made me undeclared. Can I change or request my major to Biology at the beginning of this year? Is it possible to do that when I’m undeclared. I want to be in a Bio major as a freshmen. Thank you!

@Dreamer009 Accepted from the waitlist and admitted as undeclared too. Orginally, I applied as a nursing major.