I understand how important it is to successfully connect your bank account to QuickBooks Online, gnahikian. I'm here to help you with that.
When you set up online banking, the system will ask you to enter the username and password you use for your bank's website. Thus, I'd suggest making sure you've connected to the correct bank.
Additionally, I've included these articles that'll help you in ensuring your bank transactions are reviewed and categorized accurately in QuickBooks Online:
Hope you’re doing great. I wanted to see how everything about connecting your bank in QuickBooks Online. Do you need any additional help or clarification? If you do, just let me know. I’d be happy to help you at anytime.
Looking forward to your reply. Have a pleasant day ahead!