Hello there, nwstraightlineti.
Let me help you link your bank account into QuickBooks Online (QBO).
Did you encounter any specific error while trying to link your bank in QBO? If you're referring to the Error 103, which means that your QBO banking credentials don’t match with your Financial Institution on file.
To resolve this, you can follow the steps below. If it's your first time to connect your bank to QuickBooks, be sure to select the right bank and enter your banking credentials correctly.
To know more about fixing the Error 103 in QuickBooks Online, feel free to check out this article.
However, if you're experiencing referring to other banking errors, let me share this article that provides steps on how to resolve specific banking errors. You can proceed to Step 3: Fix specific banking errors.
Let me know how it goes. Drop me a reply if there's anything I can help you with connecting bank accounts in QBO. I'm always here to assist.