diff --git a/aeat_mapping.py b/aeat_mapping.py
index e8cc5e9..abdf5fe 100644
--- a/aeat_mapping.py
+++ b/aeat_mapping.py
@@ -31,11 +31,14 @@ class BaseTrytonInvoiceMapper(Model):
     invoice_kind = attrgetter('sii_operation_key')
     rectified_invoice_kind = callback_utils.fixed_value('I')
     not_exempt_kind = attrgetter('sii_subjected_key')
+    exempt_kind = attrgetter('sii_excemption_key')
     counterpart_name = attrgetter('party.name')
     counterpart_nif = attrgetter('party.sii_vat_code')
     counterpart_id_type = attrgetter('party.sii_identifier_type')
     counterpart_country = attrgetter('party.sii_vat_country')
     counterpart_id = counterpart_nif
+    untaxed_amount = attrgetter('untaxed_amount')
+    total_amount = attrgetter('total_amount')
     tax_rate = attrgetter('tax.rate')
     tax_base = attrgetter('base')
     tax_amount = attrgetter('amount')