If you created your Single Candidate Portal profile with a corporate EU Login account: 

Your data is copied from Sysper and cannot be changed in the Single Candidate Portal.  

If you created your Single Candidate Portal profile with an external EU Login account:  

You can request a change of personal data via the “Contact us” menu in the Single Candidate Portal. All change requests must be supported by a copy of an official document justifying the change.  

Please note that acceptance of this change will take several days so please do not create another identical request. Do not wait until the change(s) is/are validated, but go ahead with your application/test booking etc.