What is your mailing address? December 10, 2020 13:50 Updated Our office address is 155A Industrial Drive, Northampton MA 01060. Please see our return and refund policy for information on returns. Related articles I need a copy of your W-9. Where can I find it? Can I place an order with a purchase order? How long will it take for my shipment to arrive? How do I submit my manuscript for review? Do you charge sales tax?