It goes to whichever address is in your survey profile at the moment we lock your order, so updating it there is all you need to do.
You can change your shipping details at any point before that lock by logging into your survey profile. About 48 hours beforehand we send a "Final Address Confirmation" email, so it is worth watching your inbox for it and checking the address it shows. If everything on it is correct, there is nothing further to do.
If you notice the old address after that window has closed, message us here, or email [email protected], with your order number and the correct address. As long as the parcel has not left the warehouse we can usually still change it, so it is worth writing in straight away.