Changing Your Address With The DMV
California law states you must change your address when you move to a different permanent address.
Online Change of Address:
You can file your change of address online if you have a California Driver license or California ID
You must have a Social Security Number
You have to currently live in California
A Change of Address must be filed on your drivers license and a separate change of address needs to be filed on your vehicle.
United States Postal Service
USPS provides moving services for people that are relocating. USPS
If you have a PO Box, you must provide a physical address too, when initiating a change of address.