I’m trying to connect QB to my bank account and QB keeps saying my bank is down for maintenance.

Hello there, @cringckle-icloud

Thank you for reaching out to us. I'm here to make sure that you can connect your bank account to QuickBooks Online.

May I know if you're getting error 102 or 105? If so, your bank may have a system maintenance or server issue and this can stop the online bank connection to QuickBooks. If you keep seeing errors 102 or 105, you can manually update the online bank connection in QuickBooks.. 

To update the account:

• Go to the Banking menu or Transactions menu on the left panel. 

• Then click on the Update button. 

If you still see an error, please wait for about 2 to 3 hours and try again.

Please check out this article to know how to fix online banking errors in QuickBooks Online (QBO) 

You can visit the QuickBooks Community again if you have other bank concerns in QuickBooks. I’m always here to help you.