To update or change your linked checking account:
First, click on the Settings icon at the top left corner of the Home screen, then tap your Bank Account, and press "Change My Bank Account". You'll have the option to select your bank from the list or search for it in the bar at the top.
You can also link your checking account manually via routing and account numbers by typing in "Qoins" in the search bar and then clicking the "Link with account numbers" button. Follow the prompts to see how this process works.
If you have any trouble with this, please let us know!