Hi newbie22,

Thanks for posting in the Community! Let me show you how to run a cost report in QuickBooks Online. 

1. Go to Reports.
2. Search for Profit and Loss (or Profit and Loss Detail).
3. Select Report period then Run report.
4. Click on the amount of a cost account to see the transaction list.
5. Click on the small gear icon and tick on the details you would like to show on the report. 

For your reference, you can check on this article: Use reports to see your sales and inventory status.

Feel free to post again if you need any help. Have a great day!