You can change the company address displayed at the top of your invoices by changing the company address associated with your account.
FROM THE WEB APP
Step 1: Go to settings > edit company profile
Step 2: Change your default payment type
Step 3: Save (at the bottom of the page)
FROM THE MOBILE APP
This setting can only be changed on the web app at this time. We are working to bring this functionality to the mobile app.