diff --git a/invoice.py b/invoice.py
index 10b9f4a..b73726c 100755
--- a/invoice.py
+++ b/invoice.py
@@ -1109,16 +1109,28 @@ class Invoice(metaclass=PoolMeta):
         return {'amount_invoiced_goods': amount_invoiced_goods}
 
     def get_id_type(self, name):
-        if self.party:
-            if not self.party_tax_identifier:
-                return None
-            code_length = len(self.party_tax_identifier.code)
-            if code_length == 9:
-                return 1
-            elif code_length == 11:
-                return 2
-            else:
-                return 3
+        if not self.party or not self.party_tax_identifier:
+            return None
+
+        identifier = self.party_tax_identifier
+        identifier_type = getattr(identifier, 'type', None)
+        if identifier_type in {'do_rnc', 'do_vat'}:
+            return 1
+        if identifier_type == 'do_cedula':
+            return 2
+
+        # Tryton 8.0 stores a formatted display code (for example
+        # ``1-01-01063-2`` or ``001-1391820-5``). Use code_compact when
+        # available and still normalize it for migrated records whose compact
+        # value may retain the old formatting.
+        code = (getattr(identifier, 'code_compact', None)
+            or getattr(identifier, 'code', None) or '')
+        digits = re.sub(r'\D', '', code)
+        if len(digits) == 9:
+            return 1
+        if len(digits) == 11:
+            return 2
+        return 3
 
     @fields.depends('taxes', 'lines')
     def on_change_with_itbis_invoiced(self, name=None):
diff --git a/tests/test_module.py b/tests/test_module.py
index 4b1b77b..874a0b2 100644
--- a/tests/test_module.py
+++ b/tests/test_module.py
@@ -370,6 +370,37 @@ del ModuleTestCase
 
 class NcfManagerUnitTestCase(unittest.TestCase):
 
+    @staticmethod
+    def invoice_with_identifier(code, type=None, code_compact=None):
+        identifier = SimpleNamespace(code=code, type=type)
+        if code_compact is not None:
+            identifier.code_compact = code_compact
+        return SimpleNamespace(
+            party=object(), party_tax_identifier=identifier)
+
+    def test_id_type_accepts_formatted_rnc(self):
+        invoice = self.invoice_with_identifier('1-01-01063-2')
+        self.assertEqual(Invoice.get_id_type(invoice, 'id_type'), 1)
+
+    def test_id_type_accepts_formatted_cedula(self):
+        invoice = self.invoice_with_identifier('001-1391820-5')
+        self.assertEqual(Invoice.get_id_type(invoice, 'id_type'), 2)
+
+    def test_id_type_uses_dominican_identifier_type(self):
+        rnc = self.invoice_with_identifier('formatted', type='do_vat')
+        cedula = self.invoice_with_identifier('formatted', type='do_cedula')
+        self.assertEqual(Invoice.get_id_type(rnc, 'id_type'), 1)
+        self.assertEqual(Invoice.get_id_type(cedula, 'id_type'), 2)
+
+    def test_id_type_normalizes_migrated_compact_code(self):
+        invoice = self.invoice_with_identifier(
+            'display value', code_compact='001-1391820-5')
+        self.assertEqual(Invoice.get_id_type(invoice, 'id_type'), 2)
+
+    def test_id_type_returns_none_without_identifier(self):
+        invoice = SimpleNamespace(party=object(), party_tax_identifier=None)
+        self.assertIsNone(Invoice.get_id_type(invoice, 'id_type'))
+
     def test_invoice_report_uses_current_tax_field_names(self):
         path = Path(__file__).parents[1] / 'invoice.fodt'
         template = path.read_text(encoding='utf-8')
diff --git a/tryton.cfg b/tryton.cfg
index b8fcb89..a211bbb 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=8.0.0
+version=8.0.1
 depends:
 	account_do
 	account_invoice_do