Add the new fields tht he proces of update from temaplte tax to tax

account.py

@@ -32,7 +32,7 @@ class TemplateTax:
         res = super(TemplateTax, self)._get_tax_value(tax)
         for field in ('sii_book_key', 'sii_issued_key', 'sii_subjected_key',
                 'sii_excemption_key', 'sii_received_key',
-                'sii_intracomunity_key'):
+                'sii_intracomunity_key', 'tax_used', 'invoice_used'):
 
             if not tax or getattr(tax, field) != getattr(self, field):
                 res[field] = getattr(self, field)