diff --git a/erpnext/public/js/controllers/taxes_and_totals.js b/erpnext/public/js/controllers/taxes_and_totals.js
index a87c3ec..974b937 100644
--- a/erpnext/public/js/controllers/taxes_and_totals.js
+++ b/erpnext/public/js/controllers/taxes_and_totals.js
@@ -131,8 +131,8 @@
 					item.net_amount = item.amount = flt(item.rate * item.qty, precision("amount", item));
 				}
 				else {
-					let qty = item.qty || 1;
-					qty = me.frm.doc.is_return ? -1 * qty : qty;
+					// allow for '0' qty on Credit/Debit notes
+					let qty = item.qty || -1
 					item.net_amount = item.amount = flt(item.rate * qty, precision("amount", item));
 				}