Hi there, cheryl-royalscot.
It would be helpful to know what bank you're trying to connect with QuickBooks Online, cheryl-royalscot.
For now, let's try to click the Update button and see if you're able to update the transaction. If this won't work, let's use a web connect for this Also, I recommend to check the status of your bank if it is under maintenance.
You can visit this article for your future reference on how to troubleshoot issues with Bank Feeds.
Reply to this thread if you have other concerns. I'm here to help.
