diff --git a/modules/customer-invoices/src/web/proformas/update/controllers/use-update-proforma-items-controller.ts b/modules/customer-invoices/src/web/proformas/update/controllers/use-update-proforma-items-controller.ts
index 9c6c5f5b..72558919 100644
--- a/modules/customer-invoices/src/web/proformas/update/controllers/use-update-proforma-items-controller.ts
+++ b/modules/customer-invoices/src/web/proformas/update/controllers/use-update-proforma-items-controller.ts
@@ -131,7 +131,9 @@ export const useUpdateProformaItemsController = ({
 
       const duplicatedItem: ProformaItemUpdateForm = {
         ...item,
-        id: buildProformaItemUpdateDefault(index + 1).id,
+        id: buildProformaItemUpdateDefault(index + 1, {
+          defaultTaxPercentage: getValues("taxPercentage") ?? undefined,
+        }).id,
         position: index + 1,
       };
 
@@ -177,7 +179,14 @@ export const useUpdateProformaItemsController = ({
       const safeIndex = Math.max(0, Math.min(index, currentItems.length));
 
       const nextItems = [...currentItems];
-      nextItems.splice(safeIndex, 0, buildProformaItemUpdateDefault(safeIndex));
+
+      nextItems.splice(
+        safeIndex,
+        0,
+        buildProformaItemUpdateDefault(safeIndex, {
+          defaultTaxPercentage: getValues("taxPercentage") ?? undefined,
+        })
+      );
 
       replaceItems(nextItems);
     },