What happens if my name has changed since I registered the plates, can I still get a refund?
If your name had changed and you are looking for a refund, bring the plates with you to the DMV office when surrendering. Yu must request a transfer receipt and not a refund receipt. You then send these to the address that you'll find on the Request for Refund MV-215 form
Can I, by the way, renew my registration online?
In most cases, but some vehicles can not be renewed online.