One bank can be linked to your StellarFi account at a time, not multiple banks. To connect or update your bank account on file, please follow the instructions below:
1. Log in to your StellarFi account using your credentials
2. Click on your initials located on the top right of the page
3. Click "Account Settings"
4. Click "Linked Account"
5. Click the 3 vertical dots on the top right
6. And lastly, click "Update bank account"