Can we upload bills with item details in a single bill?

Hi userthamalu-cosmetic,

Uploading bills is not available in QuickBooks Online. You will want to enter them manually instead. Here's an article for your reference: Enter bills and record bill payments in QuickBooks Online.

On the other hand, if you want to see references for QBO, you can visit the main support page and click on Global Help Articles.

I'm just right here if you have other questions about bills.