diff --git a/source/app/models/main.py b/source/app/models/main.py
index 696ecf8..240a7c6 100644
--- a/source/app/models/main.py
+++ b/source/app/models/main.py
@@ -7683,6 +7683,7 @@ class CfdiPagos(BaseModel):
                     }
                     taxes_pay['traslados'][tax_key] = values
             elif tax.impuesto.tipo == 'R':
+                tax_key = tax.impuesto.key
                 retenciones.append(values)
                 if tax_key in taxes_pay['retenciones']:
                     taxes_pay['retenciones'][tax_key] += import_dr