Category from Invoice does not appear on Itemized Category Report

I entered the correct category when I set up the invoice. The payments were received (they show as transfers to the business checking account) but the Itemized Category Report does not show the payments to the category that was entered on the invoice. I would like to see invoiced and non-invoiced income on the Itemized Category Report for tax purposes. The Cash Flow Report in the BUSINESS section does show these payments in the correct category. Thank you