Zen 1.3.8. I live in AZ and do not have an AZ retail license. AZ law requires me to have a retail license to collect sales tax from sales to AZ customers. Because of the license requirements, I do not want to make any sales to AZ residents/AZ shipping addresses. Is there a way to prevent sales to AZ residents/AZ shipping addresses? Currently I email the AZ resident saying that I am sorry, but I cannot make a sale to anyone within the State Of Arizona and refund their payment. I would like to avoid this entirely. Any help??