You can wait until after you move to update your address with your state’s DMV, but some states require you to update your address sooner than others. You can also wait until after you move to let your auto insurance company know about the change. At least two weeks before you move, you should notify your post office of your new address and the date of your move. You should also forward any bills and statements from your previous address to your new home, and update your bank accounts with your new address, so all your information is up-to-date.