fix: fetch item_tax_template values if fields with fetch_from exisit

erpnext/controllers/accounts_controller.py

@@ -650,6 +650,7 @@ class AccountsController(TransactionBase):
 
 					args["doctype"] = self.doctype
 					args["name"] = self.name
+					args["child_doctype"] = item.doctype
 					args["child_docname"] = item.name
 					args["ignore_pricing_rule"] = (
 						self.ignore_pricing_rule if hasattr(self, "ignore_pricing_rule") else 0

erpnext/public/js/controllers/transaction.js

@@ -513,6 +513,7 @@ erpnext.TransactionController = class TransactionController extends erpnext.taxe
 							cost_center: item.cost_center,
 							tax_category: me.frm.doc.tax_category,
 							item_tax_template: item.item_tax_template,
+							child_doctype: item.doctype,
 							child_docname: item.name,
 							is_old_subcontracting_flow: me.frm.doc.is_old_subcontracting_flow,
 						}

erpnext/stock/get_item_details.py

@@ -8,6 +8,7 @@ import frappe
 from frappe import _, throw
 from frappe.model import child_table_fields, default_fields
 from frappe.model.meta import get_field_precision
+from frappe.model.utils import get_fetch_values
 from frappe.query_builder.functions import IfNull, Sum
 from frappe.utils import add_days, add_months, cint, cstr, flt, getdate
 
@@ -574,6 +575,9 @@ def get_item_tax_template(args, item, out):
 			item_tax_template = _get_item_tax_template(args, item_group_doc.taxes, out)
 			item_group = item_group_doc.parent_item_group
 
+	if args.get("child_doctype") and item_tax_template:
+		out.update(get_fetch_values(args.get("child_doctype"), "item_tax_template", item_tax_template))
+
 
 def _get_item_tax_template(args, taxes, out=None, for_validate=False):
 	if out is None: