N.H. Rev. Stat. Ann. § 78-E:9

The protections for New Hampshire remote sellers provided by this chapter are intended to supplement, and not replace or supplant, protections provided to retailers under RSA 78-D. Therefore, in any situation where a provision of this chapter conflicts with the provisions of RSA 78-D, the provision that provides greater protection from sales and use tax collection liabilities to a New Hampshire remote seller or retailer, as that term is defined in RSA 78-D, shall control.