Once an order has been placed, you cannot change the address under your account.
However, there is a small window from the time you place the order to the point it is ready to be shipped that we can try and update the address for you. Please contact our Dr. Martens Experts through Live Chat or call them on 0800 300 990 and press option 2 once prompted. They'll do their best to try and update the address for you, however, due to the nature of quick turnaround times for our orders, we cannot guarantee this.