My banking connection stopped working, with no changes to the account and now won't let me reconnect. How to fix this?

Try opening your QBO account on any private/incognito browser.

Hi geometrydesign1,

Thanks for reaching out here.  Having the ability to automatically upload your transactions to QuickBooks Online can be a time saver.  However, when you're unable to connect your account, it affects your daily bookkeeping tasks.  In order to get back to business as soon as possible, I suggest contacting us outside of Community, so we can look further into your situation from our end and escalate it for further investigation if needed.

Schedule a Callback or start a Chat: click (?) Help in the upper right in QuickBooks Online > enter "Contact support" > hit Contact Us > provide a brief summary of your situation > hit Let's Talk > choose Get a callback or Start a Chat.
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If you have any other questions or concerns, please don't hesitate to reach out again.  We'd be happy to help!