fix: Itemised tax rate updation
diff --git a/erpnext/regional/united_arab_emirates/utils.py b/erpnext/regional/united_arab_emirates/utils.py
index f350ec4..bdede84 100644
--- a/erpnext/regional/united_arab_emirates/utils.py
+++ b/erpnext/regional/united_arab_emirates/utils.py
@@ -26,9 +26,12 @@
 		elif row.item_code and itemised_tax.get(row.item_code):
 			tax_rate = sum([tax.get('tax_rate', 0) for d, tax in itemised_tax.get(row.item_code).items()])
 
-		row.tax_rate = flt(tax_rate, row.precision("tax_rate"))
-		row.tax_amount = flt((row.net_amount * tax_rate) / 100, row.precision("net_amount"))
-		row.total_amount = flt((row.net_amount + row.tax_amount), row.precision("total_amount"))
+		meta = frappe.get_meta(row.doctype)
+
+		if meta.has_field('tax_rate'):
+			row.tax_rate = flt(tax_rate, row.precision("tax_rate"))
+			row.tax_amount = flt((row.net_amount * tax_rate) / 100, row.precision("net_amount"))
+			row.total_amount = flt((row.net_amount + row.tax_amount), row.precision("total_amount"))
 
 def get_account_currency(account):
 	"""Helper function to get account currency."""