It seems that Nikon has a secret new promotion called “We pay your sales tax” – they will pay the sales tax for you when you buy new Nikon gear from B&H. I am not sure what the details, but you can try to add a Nikon product to your cart at B&H and see if you will qualify.
Update: the new Nikon sales tax promo is now official at B&H:
I tested that with a Nikkor 24-70mm lens and D810 camera, entered a NYC zip code and received credit for the tax during checkout:
