diff --git a/erpnext/controllers/taxes_and_totals.py b/erpnext/controllers/taxes_and_totals.py
index ebbe3d9..8e1510a 100644
--- a/erpnext/controllers/taxes_and_totals.py
+++ b/erpnext/controllers/taxes_and_totals.py
@@ -15,6 +15,9 @@
 		self.calculate()
 
 	def calculate(self):
+		if not len(self.doc.get("items")):
+			return
+
 		self.discount_amount_applied = False
 		self._calculate()