Hey, everyone:
Here's the site for the general UC Application that students may utilize to apply online.
http://www.universityofcalifornia.edu/admissions/
Although the site suggests that the online app won't be available till October 1st, you can probably download a paper/hard copy app if you want to be an early bird and start preparing for your app now.
Wishing you the best of luck!,
Patti K