After changing the bank information, you'll need to initiate a small test deposit again to verify if the bank account can receive payments. For more information, check out this article: Verify test transaction.
I've also added these articles below to learn more about how to cancel or edit bill payments and new updates for Online Bill Pay.
Need to change account information for a direct deposit automatic bill payment. Where do I access the online Bill pay account information?
Are you giving me directions for the QuickBooks desktop version? I'm using QBO and it looks nothing like what you are directing me to. Thanks for the response and the help - just don't think it applies to what I'm using.