Some non-profit organizations have tax-exempt status in their state or municipality and if certain protocols are followed they can be exempted from sales tax.
Tax-exempt status is handled differently by each state and by the federal government. Different locations have different regulations. Some require a certain form of proof, others require the organization to register with the state to receive an exemption certificate, etc. Due to their being so many different requirements from each state, we are not able to verify tax-exempt status on a customer's behalf. As such, we will collect and remit sales tax to the state for their purchase.