I have already connected bank under banking , however when i tried to to see expense ,it asked to connect the bank again, which i did ,then it says it already a connected

Hello there, @imram-bhat1984-g.

Connecting your bank and credit card accounts to QuickBooks Online is a great way to track your income and spending without having to manually enter every transaction.

If you encounter unusual behavior, clearing the browser's cache is one of the solutions we recommend when getting unexpected behavior in QuickBooks Online. It is due to piled-up cache in your regular browser caused this unusual behavior. 

Clearing the cache will enhance the overall performance of the browser. You can use this article so you’ll be guided with the steps on clearing cache and cookies: Clear cache and cookies.  

You can also use other supported browsers to log in to QuickBooks Online. 

I’m adding an article for your reference on how to use Online Banking and connect bank accounts in QuickBooks Online. Connect your online bank accounts in QuickBooks Online.

Reach out to me if you need further assistance while working in QBO. I’ll be right here to help and make sure you’re taken care of. Have a good one.