diff --git a/locale/es.po b/locale/es.po
index 4dbade3..361e158 100644
--- a/locale/es.po
+++ b/locale/es.po
@@ -37,3 +37,7 @@ msgstr "Bar"
 msgctxt "model:ir.model.button,string:sale_print_bill_button"
 msgid "Bill"
 msgstr "Subtotal"
+
+msgctxt "field:sale.sale,total_discount:"
+msgid "Total Discount"
+msgstr "Total Descuento"
\ No newline at end of file
diff --git a/sale.py b/sale.py
index 3497c86..b99b6f7 100644
--- a/sale.py
+++ b/sale.py
@@ -1,6 +1,8 @@
 from trytond.pool import Pool, PoolMeta
 from trytond.model import ModelView, fields
 from trytond.transaction import Transaction
+from trytond.modules.currency.fields import Monetary
+from decimal import Decimal
 
 import requests
 import json
diff --git a/view/sale_form.xml b/view/sale_form.xml
index dff9d0b..4604357 100644
--- a/view/sale_form.xml
+++ b/view/sale_form.xml
@@ -12,7 +12,7 @@ this repository contains the full copyright notices and license terms. -->
 	</group>
 	<newline/>
     </xpath>
-    <xpath expr="/form/notebook/page[@id='purchase']/group[@id='amount']/field[@name='tax_amount']" position="after">
+    <xpath expr="/form/notebook/page[@id='sale']/group[@id='amount']/field[@name='tax_amount']" position="after">
 		<label name="total_discount"/>
 		<field name="total_discount"/>
     </xpath>