In that case bring the dealer 's bill of sale that shows that you paid NY State sales tax.
Ok, one more thing, what should I do if I rent a vehicle from a dealership in another state, should I register it or will they do the whole process?
The dealer normally registers the vehicle for you by providing all your proofs and your registration application to the DMV. In this case, you don't need to do anything more.
I was wondering if when I register this vehicle, will I have to pay any additional taxes?