Once you're finished, let your partner know they will need to go through the same process using online banking or the app (whichever they prefer). When they're filling out the application, make sure that they choose the same account type that you did and mark it as a 'Joint' and then choose your name from the dropdown menu.
If the application was successful, your account will be opened instantly, ready for you to use right away. If it wasn't successful, we'll explain what else you need to do.