Thanks for reaching out to the Community, @alishbrown2.

May I know what specific bank you're trying to connect to QuickBooks Online (QBO)? Any additional information can help us determine your banking issue.

In the meantime, try signing into your QBO account using a private browser (incognito). This will help us check if this is a browser-related issue (cache and cookies).

Here's how:

• Press Ctrl + Shift + N (Google Chrome).
• Ctrl + Shift + P (Firefox).
• Control + Option + P (Safari).

Once logged in, try to connect the bank again to double-check. I suggest checking out this article for the detailed steps on how: Connect bank and credit card accounts to QuickBooks Online.

If it's successful, return to your default browser and perform a clear cache to refresh the system. However, if the issue persists, try using other supported browsers.

Please know that I'm only a post away if you have any other issues or concerns. I'll be here to assist. Have a good one!