Final answer:
You must notify the DMV promptly if your address changes from that on your driver's license. Requirements vary by state, and in California, you should keep a written note of your new address with your driver's license or ID card, especially since it affects your voting registration.
Step-by-step explanation:
When your address changes from that on your driver's license, different states have varying requirements for how soon you must notify the Department of Motor Vehicles (DMV). In California, for instance, you have specific steps to follow: you must type or write your new address on a small piece of paper with your signature and date and keep it with your driver's license or ID card.
Additionally, commercial licensed drivers must maintain a California residence address, or their license will be downgraded to non-commercial status. DMV services can also include updates to your voting address if you have moved within the same county.
If you move to a new county, you will need to complete a new voter registration card through forms provided by the DMV or by contacting them directly. The amount of time you have to update your information may vary, and it's important to do so promptly to ensure that your driver's license and voter registration information are current.