Hi Gabrielle.
There's few things to consider if you want discounts to appear in reports.
First, discounts must be applied to the transaction itself to show up in reports. Once applied, they appear in the Sales by Item Detail report, which reflects item-level sales and discounts. If discounts are not applied, they won’t be included in any sales or item reports.
If you only want the discount to appear in a single report (without changing the underlying transactions), export the report to Excel and add the discount there manually.
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