diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index 1686314..010963a 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -764,3 +764,4 @@
 execute:frappe.db.set_value('System Settings', None, 'app_name', 'ERPNext')
 erpnext.patches.v13_0.rename_discharge_date_in_ip_record
 erpnext.patches.v12_0.purchase_receipt_status
+erpnext.patches.v12_0.add_document_type_field_for_italy_einvoicing
\ No newline at end of file
diff --git a/erpnext/patches/v12_0/add_document_type_field_for_italy_einvoicing.py b/erpnext/patches/v12_0/add_document_type_field_for_italy_einvoicing.py
new file mode 100644
index 0000000..4d649dd
--- /dev/null
+++ b/erpnext/patches/v12_0/add_document_type_field_for_italy_einvoicing.py
@@ -0,0 +1,18 @@
+from __future__ import unicode_literals
+from frappe.custom.doctype.custom_field.custom_field import create_custom_fields
+import frappe
+
+def execute():
+	company = frappe.get_all('Company', filters = {'country': 'Italy'})
+	if not company:
+		return
+
+	custom_fields = {
+		'Sales Invoice': [
+			dict(fieldname='type_of_document', label='Type of Document',
+				fieldtype='Select', insert_after='customer_fiscal_code',
+				options='\nTD01\nTD02\nTD03\nTD04\nTD05\nTD06\nTD16\nTD17\nTD18\nTD19\nTD20\nTD21\nTD22\nTD23\nTD24\nTD25\nTD26\nTD27'),
+		]
+	}
+
+	create_custom_fields(custom_fields, update=True)
\ No newline at end of file
diff --git a/erpnext/regional/italy/setup.py b/erpnext/regional/italy/setup.py
index a1f5bb9..7db2f6b 100644
--- a/erpnext/regional/italy/setup.py
+++ b/erpnext/regional/italy/setup.py
@@ -139,6 +139,9 @@
 			dict(fieldname='customer_fiscal_code', label='Customer Fiscal Code',
 				fieldtype='Data', insert_after='cb_e_invoicing_reference', read_only=1,
 				fetch_from="customer.fiscal_code"),
+			dict(fieldname='type_of_document', label='Type of Document',
+				fieldtype='Select', insert_after='customer_fiscal_code',
+				options='\nTD01\nTD02\nTD03\nTD04\nTD05\nTD06\nTD16\nTD17\nTD18\nTD19\nTD20\nTD21\nTD22\nTD23\nTD24\nTD25\nTD26\nTD27'),
 		],
 		'Purchase Invoice Item': invoice_item_fields,
 		'Sales Order Item': invoice_item_fields,
diff --git a/erpnext/regional/italy/utils.py b/erpnext/regional/italy/utils.py
index 08573cd..ba1aeaf 100644
--- a/erpnext/regional/italy/utils.py
+++ b/erpnext/regional/italy/utils.py
@@ -57,11 +57,12 @@
 	invoice.company_address_data = company_address
 
 	#Set invoice type
-	if invoice.is_return and invoice.return_against:
-		invoice.type_of_document = "TD04" #Credit Note (Nota di Credito)
-		invoice.return_against_unamended =  get_unamended_name(frappe.get_doc("Sales Invoice", invoice.return_against))
-	else:
-		invoice.type_of_document = "TD01" #Sales Invoice (Fattura)
+	if not invoice.type_of_document:
+		if invoice.is_return and invoice.return_against:
+			invoice.type_of_document = "TD04" #Credit Note (Nota di Credito)
+			invoice.return_against_unamended =  get_unamended_name(frappe.get_doc("Sales Invoice", invoice.return_against))
+		else:
+			invoice.type_of_document = "TD01" #Sales Invoice (Fattura)
 
 	#set customer information
 	invoice.customer_data = frappe.get_doc("Customer", invoice.customer)