I can give you an example of how a refund is determined.
Can I get a refund for the first year of my registration after receiving a refund for the second year?
Yes, but only if you have the unused registration sticker and stub. If so, then you are eligible for the refund of the first year of the registration. You have a maximum of 60 days after the date the registration was made to apply for a refund for the first year of the registration fee.
In case the registrant passed away, can I get a refund?
Yes. The refund will be issued to the name of the state. You need to surrender the vehicle plates at DMV office and request a transfer receipt, not a refund receipt.
My registration sticker was attached to the windshield.
In that case, you can not remove the sticker and can't apply for a refund.
How can I know if I'm eligible for a refund?
After confirming your eligibility, the DMV will issue a receipt that displays "two year refund"
So there's nothing I can do if the sticker was attached to the windshield?
You can't apply for a full refund if you attached the sticker, you can't remove it.
What is needed in order to apply for a full 2-year refund?