Please send all returns postpaid directly to our warehouse. To guarantee delivery, please insure your package or ship it by UPS. Data Trace Publishing Company Returns Department 110 West Road Suite 227 Towson, MD 21204 Please include a copy of the original invoice (or the invoice number and invoice date) with the returned book or video so that we can issue the proper credit or refund. For detailed information on submitting returns, please see our returns policy.