In the Data Settings of EZ Exporter, you can select the following line item fields related to refunds:

• line_items.refunded_quantity
• line_items.refunded_subtotal
• line_items.refunded_total_tax

In case you'd like to combine the line item refunded subtotal and refunded taxes, you can add them up in a Calculated Field:

{{ line_items.refunded_subtotal }} + {{ line_items.refunded_total_tax }}