You must still surrender the vehicle plates at a DMV office, but request a transfer receipt, not a refund receipt.  You will then send that to the address of the Request for Refund MV-215 form along with the completed and signed Request for Refund [1] MV-215 and proof of the name change such as a marriage certificate, divorce certificate, or other court papers.   At that point, the DMV will issue your refund in your new name if you are eligible.
Will the DMV issue a refund if the registrant died?
The DMV will issue the refund to the name of the estate if the plates are surrendered at the DMV office and a transfer receipt is requested and the executor of the estate sends a completed and signed Request for Refund [1]MV-215, with "deceased" written on the form, a photocopy of the death certificate, and the transfer certificate to the address listedon the Request for Refund MV-215.