If you take delivery of your order in most US states and don’t have a resale certificate, you’ll need to pay sales tax. Resale certificates are issued by the state to registered businesses that resell their merchandise to distributors and retailers. A resale certificate exempts you from paying taxes on the manufactured product because those taxes will be passed on to the consumer when you collect sales tax.
Note: Unless you run a full-time business that sells to distributors and retailers, a resale certificate is often difficult to obtain.