From your client area, you have the possibility to modify domain contacts. To do this, you will have to access the Domains > My domains dropdown menu.

Once inside, you will see the list of your domains registered in Profesional Hosting. You will have to locate the domain and on the right side you will see a menu of tools and options, you will have to click on the arrow and select Edit contact information.

IMPORTANT: Once inside, modify each contact individually, saving changes each time you modify a contact, as if you modify them all at once, sometimes the change is not saved correctly.

If you get an error when saving changes, check that the domain is unlocked.