Contact the DMV Call Center. They will be able to assist you with any questions that you have about that topic.
What if I'm not able to surrender my plates after letting my insurance lapse?
DMV has a procedure in place to exempt you from administrative actions once you return. You will need to provide a notarized statement that your vehicle was not used during the time in question, a copy of your military ID, and signed and dated copies of deployment and return papers. You will also need to provide proof of current insurance. If you cannot, you will need to surrender your plates.
Who issued these extensions for military personnel?