fix: fetch item_tax_template values if fields with fetch_from exisit
diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index d12d50d..e68894f 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -625,6 +625,7 @@
 
 					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
diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index 2c40f49..6dc24fa 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -512,6 +512,7 @@
 							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,
 						}
diff --git a/erpnext/stock/get_item_details.py b/erpnext/stock/get_item_details.py
index c766cab..5143067 100644
--- a/erpnext/stock/get_item_details.py
+++ b/erpnext/stock/get_item_details.py
@@ -8,6 +8,7 @@
 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
 
@@ -571,6 +572,9 @@
 			item_tax_template = _get_item_tax_template(args, item_group_doc.taxes, out)
 			item_group = item_group_doc.parent_item_group
 
+	if args.child_doctype and item_tax_template:
+		out.update(get_fetch_values(args.child_doctype, "item_tax_template", item_tax_template))
+
 
 def _get_item_tax_template(args, taxes, out=None, for_validate=False):
 	if out is None: