fix: populate item tax template when mapping subcontracting order

india_compliance/gst_india/overrides/subcontracting_transaction.py

@@ -1,6 +1,7 @@
 import frappe
 from frappe import _, bold
 from frappe.contacts.doctype.address.address import get_address_display
+from erpnext.stock.get_item_details import _get_item_tax_template
 
 from india_compliance.gst_india.overrides.sales_invoice import (
     update_dashboard_with_gst_logs,
@@ -37,6 +38,30 @@ def after_mapping(doc, method, source_doc):
         return
 
     set_taxes(doc)
+    set_item_tax_template(doc, source_doc.as_dict())
+
+
+def set_item_tax_template(doc, args):
+    args["tax_category"] = frappe.db.get_value(
+        "Purchase Taxes and Charges Template", args.taxes_and_charges, "tax_category"
+    )
+
+    for item in doc.items:
+        item_doc = frappe.get_cached_doc("Item", item.item_code)
+
+        item_tax_template = None
+        if item_doc.taxes:
+            item_tax_template = _get_item_tax_template(args, item_doc.taxes)
+
+        if not item_tax_template:
+            item_group = item_doc.item_group
+
+            while item_group and not item_tax_template:
+                item_group_doc = frappe.get_cached_doc("Item Group", item_group)
+                item_tax_template = _get_item_tax_template(args, item_group_doc.taxes)
+                item_group = item_group_doc.parent_item_group
+
+        item.item_tax_template = item_tax_template
 
 
 def set_taxes(doc):