chore(release): Bumped to Version 15.66.1

## [15.66.1](https://github.com/frappe/erpnext/compare/v15.66.0...v15.66.1) (2025-06-27)

### Bug Fixes

* not able to save material request ([a49026e](a49026e9d2))

erpnext/__init__.py

@@ -4,7 +4,7 @@ import inspect
 import frappe
 from frappe.utils.user import is_website_user
 
-__version__ = "15.66.0"
+__version__ = "15.66.1"
 
 
 def get_default_company(user=None):

erpnext/controllers/accounts_controller.py

@@ -1134,6 +1134,10 @@ class AccountsController(TransactionBase):
 			return True
 
 	def set_taxes_and_charges(self):
+		if self.doctype == "Material Request":
+			# Material Request does not have taxes
+			return
+
 		if self.get("taxes") or self.get("is_pos"):
 			return