What is needed to apply for the 2-year refund?
The 2-year registration fee refund can only be applied if the registration was never used and it hasn't been more than 60 days from the date the registration was issued.
So if I applied for a registration but never used the registration sticker, can I get a 2-year refund?
yes, you can apply for a refund of the 2-year fee you paid when you renewed the registration.