diff --git a/selfcare-v2-client/interface-specification.yml b/selfcare-v2-client/interface-specification.yml
index 440558c..ed1ff75 100644
--- a/selfcare-v2-client/interface-specification.yml
+++ b/selfcare-v2-client/interface-specification.yml
@@ -1804,6 +1804,8 @@ components:
           type: string
         surname:
           type: string
+        taxCode:
+          type: string  
     UserResource:
       title: UserResource
       type: object