diff --git a/maintenance.py b/maintenance.py
index adb0ebf..fa96653 100644
--- a/maintenance.py
+++ b/maintenance.py
@@ -490,7 +490,8 @@ class MaintenanceServiceLine(Workflow, ModelSQL, ModelView):
                 'invisible': (Eval('lines_calibration', [0])) | (
                     Eval('state').in_(['finished'])),
                 'depends': ['state'], },
-            'finished': {},
+            'finished': {'invisible': (Eval('state').in_(['finished'])) |
+                         ((Eval('maintenance_type') == 'corrective') & (Eval('maintenance_lines') == ()))},
         })
 
     @classmethod
diff --git a/maintenance.xml b/maintenance.xml
index 6e3d545..886c8f3 100644
--- a/maintenance.xml
+++ b/maintenance.xml
@@ -108,11 +108,10 @@
 	    <field name="model">optical_equipment.change_propietary_maintenance.form</field>
 	    <field name="type">form</field>
 	    <field name="name">change_propietary_maintenance_form</field>
-	</record>
+    </record>
 	<record model="ir.ui.view" id= "maintenance_equipment_view_form">
 	    <field name="model">optical_equipment.maintenance-optical_equipment.equipment</field>
 	    <field name="type">form</field>
-	    <!-- <field name="inherit" ref="maintenance_view_form"/> -->
 	    <field name="name">maintenance_equipment_form</field>
 	</record>
 	<record model="ir.ui.view" id="maintenance_activity_view_form">
diff --git a/sale.py b/sale.py
index b17efa4..ca69290 100644
--- a/sale.py
+++ b/sale.py
@@ -12,6 +12,7 @@ from trytond.wizard import (
     Button, StateAction, StateView, Wizard)
 from trytond.i18n import gettext
 from trytond.modules.sale.exceptions import PartyLocationError
+from datetime import datetime
 
 
 class Sale(metaclass=PoolMeta):
@@ -85,6 +86,14 @@ class Sale(metaclass=PoolMeta):
             ('processing', 'draft')
         ))
 
+    @classmethod
+    def default_agended(self):
+        return False
+
+    @classmethod
+    def default_sale_date(cls):
+        return datetime.today().date()
+
     @fields.depends('lines', 'sale_type', 'agended')
     def on_chage_sale_type(self):
         self.lines = []
@@ -93,9 +102,6 @@ class Sale(metaclass=PoolMeta):
         elif self.sale_type == "maintenance":
             self.invoice_method = 'order'
 
-    @classmethod
-    def default_agended(self):
-        return False
 
     @classmethod
     def _get_origin_contract(cls):
@@ -141,32 +147,21 @@ class Sale(metaclass=PoolMeta):
                 raise UserError(
                     gettext('optical_equipment.msg_not_sequence_quote'))
 
-    @ classmethod
+    @classmethod
     def copy(cls, sales, default=None):
-        if default is None:
-            default = {}
-        else:
-            default = default.copy()
-
-        default.setdefault('number', None)
-        default.setdefault('invoice_state', 'none')
-        default.setdefault('invoices_ignored', None)
-        default.setdefault('moves', None)
-        default.setdefault('shipment_state', 'none')
-        default.setdefault('quoted_by')
-        default.setdefault('confirmed_by')
-
+        default, = super(Sale, cls).copy(sales, default=default)
+        default.setdefault('sale_date')
         return super(Sale, cls).copy(sales, default=default)
 
-    @ classmethod
-    @ ModelView.button_action(
+    @classmethod
+    @ModelView.button_action(
         'optical_equipment.wizard_print_balance_sale_party')
     def report(cls, sales):
         pass
 
-    @ classmethod
-    @ ModelView.button
-    @ Workflow.transition('quotation')
+    @classmethod
+    @ModelView.button
+    @Workflow.transition('quotation')
     def quote(cls, sales):
         for sale in sales:
             sale.check_for_quotation()