diff --git a/source/helper/util.py b/source/helper/util.py
index 758d243..9e15f21 100644
--- a/source/helper/util.py
+++ b/source/helper/util.py
@@ -613,9 +613,12 @@ class DataToDict():
                 'Base': data[i + 1],
                 'Impuesto': data[i + 2],
                 'TipoFactor': data[i + 3],
-                'TasaOCuota': data[i + 4],
-                'Importe': data[i + 5],
             }
+            if data[i + 4]:
+                tax['TasaOCuota'] : data[i + 4]
+            if data[i + 5]:
+                tax['Importe'] : data[i + 5]
+
             if type_tax == self.TRASLADO:
                 traslados.append(tax)
             elif type_tax == self.RETENCION: