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Glad to have you here in the Community, @anita17.
I'd be glad to help you out with your concern about editing bank account information by sharing possible scenarios I could think of.
Are you trying to change your bank account information connected to QuickBooks Online (QBO)? If so, you can go to the Banking page and update your bank info from there.
After saving, QBO will try to connect with your bank to verify your information. Once you see a confirmation message, select I'm done, Let's go!
I'm adding this article for more details: How to update your bank account sign-in information.
However, if you're trying to change your bank information on your payroll account, you can go to the Payroll Settings. Let me guide you how.
After making the changes, update your bank account in the accounting preferences.
Here's an article you can read for more information: Change bank account information.
Please feel free to leave a comment below if you're referring to something else or if you have any other questions. Have a good day and stay safe.