Customer FAQs Discover answers to the most frequently asked questions from ADT customers with the click of a button. 1. How can I change my billing address while maintaining my service address? To change your billing address, log into your MyADT.com account, click on the My Account tab located on the overview page and then click on Billing Information from the left hand menu. This change will not affect your service address. It may take up to one billing cycle for the new billing address to be updated so continue to look for your next statement at your old billing address.