Our tax service, Avalara, determines the taxes charged to your account. If you are a tax-exempt entity or reseller and you see taxes calculated on your order, please contact support@deterrasystem.com and provide a copy of your tax exempt or reseller certificate for processing. If you have already sent your certificate, please note it can take up to two days to process. If you have already provided a tax exempt certificate for orders placed with us in the past, this should not require any change on your part and taxes should not be collected on your order.