What would I need to do if I didn't pay the sales tax?
In that case, you would need to provide DMV with your lease agreement and complete Statement of Transaction at NY State Department of Tax and Finance DTF-802. Then, you would need to pay the sales tax at a DMV office for any lease payments, if your leasing company didn't collect the sales tax.
What do I need to register my vehicle in New York?
You'll need a letter from the leasing company giving you permission to register the vehicle in NY, a power of attorney from the leasing company that authorizes you to register the vehicle, and the signature of the leasing company officer in box 3 on the Vehicle Registration/Title Application or on the Registration Authorization.