If you itemize deductions on your income tax return, you may claim the personal property tax amount of your car registration fees.
On your vehicle registration, both State and Municipal fees paid are listed along the right-hand side of the document. The top fee listed is the State Fee, which is not tax deductible. Beneath that are the Municipal Fees.
The portion which is tax deductible is labeled on your registration as "MOS/MILLS."
(Please note, you cannot claim the small administrative fees.)