Thank you @Irene R  - sadly that didn't work either.

I followed the instructions above and Quickbooks "Found no errors with the data" I restarted and tried running the report again with the same results. Even though I can't select "All Items" in the customization filters, I can still select all my items to be included in the filter as seen in the screenshot below. So I don't think is the issue.

In the screenshot, you can see unbilled EXPENSES report in the back, but again I'm trying to run this for ITEMS.

I've added the Item Column to the report, but there's nothing pulling up. Does this feature just not actually exist?? If it's not possible, and I do have C+P hundreds of line items every month, is there a way to remove "Reimburse Group" from the customer invoice when I add an Unbilled EXPENSE?

Thank you again for all your help.