FastSpring
If a U.S. customer buys on behalf of an organization exempt from paying state and local sales taxes, FastSpring can refund the sales tax after the purchase has been completed. Customers can send a copy of their tax exemption certificate or other supporting paperwork issued by the state government along with their order reference/order ID using this link: fastspring.com/consumer-support-form/tax-vat-gst/
Paddle
If your customer has a sales tax exemption certificate, Paddle can mark the customer as tax-exempt and the tax amount will be revised accordingly. To do so, the customer will have to send the tax exemption documentation to our buyer support team via [email protected]. Their buyer support team will then review the documentation and mark the customer tax-exempt accordingly if the documentation is valid.