Thank you for visiting the QuickBooks Community, userdsleeper. I can see how important it is to connect your bank to QuickBooks without errors. Please know that getting error 105 has been recently tagged as an ongoing issue. I'll ensure you'll be routed to the right support team to assist you further.

While our product engineers are now working to fix this as soon as possible, I recommend contacting our Online Team support. This way, you'll be added as one of the affected users. Rest assured you'll be notified via email when there's an update to this issue and once this is resolved.

Here's how:

1. Open your QuickBooks Account.
2. At the top right, click the Help icon.
3. Choose the Assistant section.
4. Type your concern about connecting a bank account in the Type something field.
5. Click Talk to a human.
6. Click I still need a human.
7. Click the Get help from a human.
8. You'll be routed into the How can we help? page. Then, select either Start a chat or Get a callback and fill in the information.

Lastly, refer to this article if you need steps on how to review bank entries by matching or adding them to avoid duplicate data: Categorize online bank transactions in QuickBooks Online.

Should you need any more help with connecting bank in QBO, you can always ask your question here by hitting the Reply button or starting a new thread, userdsleeper. Stay safe!