Align invoice line tax field names

invoice.py

@@ -126,13 +126,8 @@ class InvoiceLine(metaclass=PoolMeta):
         'on_change_with_product_type'
     )
 
-    itbis_invoiced_line = fields.Function(Monetary(
-        "ITBIS Invoiced", currency='currency', digits='currency',
-        states=_LINE_STATES),
-        'get_itbis_invoiced_line'
-    )
     itbis_line = fields.Function(Monetary(
-        "ITBIS", currency='currency', digits='currency',
+        "ITBIS Invoiced", currency='currency', digits='currency',
         states=_LINE_STATES),
         'get_itbis_line'
     )
@@ -243,13 +238,9 @@ class InvoiceLine(metaclass=PoolMeta):
             return cls._round_amount(line, subtotal)
         return Decimal('0.0')
 
-    @classmethod
-    def get_itbis_invoiced_line(cls, lines, name):
-        return {l.id: cls._compute_tax_kind_amount(l, 'itbis') for l in lines}
-
     @classmethod
     def get_itbis_line(cls, lines, name):
-        return cls.get_itbis_invoiced_line(lines, name)
+        return {l.id: cls._compute_tax_kind_amount(l, 'itbis') for l in lines}
 
     @classmethod
     def get_itbis_withholding_line(cls, lines, name):
@@ -275,10 +266,6 @@ class InvoiceLine(metaclass=PoolMeta):
     def get_line_total(cls, lines, name):
         return {l.id: cls._compute_line_total_amount(l) for l in lines}
 
-    @fields.depends(*_LINE_DEPENDS, methods=['on_change_with_amount'])
-    def on_change_with_itbis_invoiced_line(self, name=None):
-        return InvoiceLine._compute_tax_kind_amount(self, 'itbis')
-
     @fields.depends(*_LINE_DEPENDS, methods=['on_change_with_amount'])
     def on_change_with_itbis_line(self, name=None):
         return InvoiceLine._compute_tax_kind_amount(self, 'itbis')