There is no barcode column in the Item Listing report.
Legacy KB ID: 1518
Question
Can I display item barcodes in the Item Listing report?Answer
There is no barcode column available in the Item listing report or any other item reports
To workaround this and have a barcode field on the Item Listing report;
1) Create a 'Custom Field' for items called 'Barcode', populate this custom field with a barcode for each item.
2) Generate an Item Listing report and modify the report to include the 'Barcode' custom field.