The Service Program gives you two way to view this report. Invoice Detail Report which will open up within The Service Program and Invoice Detail Export which opens up in an Excel Spreadsheet.
Both views of this report displays the original task number that the invoice was converted from, the customer name, the line items on the invoice, and the total charge of the invoice. You will find this report on the Closed Invoice List:
Invoice Detail Report Opened up Inside of The Service Program:
Closed Invoice Report Excel: