flectra/addons/sale_stock/report/sale_order_report_templates.xml

<?xml version="1.0"?>
<flectra>
    <template id="report_saleorder_document_inherit_sale_stock" inherit_id="sale.report_saleorder_document">
      	<xpath expr="//div[@name='payment_term']" position="after">
        	<div class="col-xs-3" t-if="doc.incoterm" groups="sale_stock.group_display_incoterm">
          		<strong>Incoterms:</strong>
          		<p t-field="doc.incoterm.code"/>
        	</div>
      	</xpath>
  	</template>
</flectra>