Good to see you in the Community, treosignaturehom.
In changing the bank account login credentials, you'll need to update it first through your bank's website. You'll want to contact your bank so they can assist you further with it.
If you already change it, you can follow these steps on how to update it in QuickBooks Online.
You can check this article for your future reference: How to manually update an account to fix banking errors.
If you still want to contact our Customer Support team, you can follow these steps:
I'm always here if you have other concerns about online banking.
I've got you covered, @seniors-1.
For all QuickBooks Online questions and concerns, please feel free to provide some additional details in a reply below and I'll be happy to help however I can. I've got all the resources and knowledge necessary to address each of your questions and concerns.
Should you prefer to speak to someone over Phone or Chat, the instructions below will help you get in touch with those Support Teams instead:
Contacting the QuickBooks Support Team
These instructions are also available from our guide on contacting QuickBooks Online support for your benefit. I've included a brief video demonstration of this below:
Please don't hesitate to let me know how I can help you succeed with QuickBooks. Thanks for dropping in, I look forward to hearing from you.
I removed your phone number for security reasons, gvenuto.
We're unable to make outbound calls in the Community. However, I am willing to answer your questions here.
If you prefer to speak with an agent, you can request for a callback within QuickBooks. Just follow the steps that MichaelDL shared above.
Have a good day!