A reseller certificate is a form you, as a buyer, submit to a seller guaranteeing that you intend to resell the product you purchase from them. This will exempt you from sales tax at the time of purchase.
A reseller certificate can be referred to under several different names depending on which form you decide to use or in which state your business is registered. Some different names for reseller certificates are as follows: a resale certificate, a certificate of exemption, a sales & use tax certificate, and so on and so forth.
Please visit this link to see which form B-Stock accepts for your state.
If your business is registered in Alaska, Delaware, Montana, New Hampshire or Oregon, this is not required as part of your application.