It's super easy to change your bank account information, At14. 

I'd be glad to guide you through the whole process of updating your account information in QuickBooks Online. 

1. Sign in to your QuickBooks online at https://qbo.intuit.com.
2. Choose the account you want to change.
3. Make your changes.
4. Click Save and Close. 

Additionally, here's a couple of articles you can read for more insights about the steps: 

• Change your bank information. 
• How to update your bank account sign-in information.   

Know that you can always visit our Help Articles page for QuickBooks Online in case you need some reference for your future tasks.

I'm more than happy to jump back on if you have any other concerns about the banking feature in QuickBooks, please let me know by adding a comment. Have a good one.