Thank u. I knew this step.
When I try this step, it appears, it doesn´t appear on the left side of the home page, but on all the others. Maybe it´s because of the theme that I'm using.
By the way, to not open a new topic (I searched all around and dind´t find a solution) when a customer register for the first time, the fiel vat_number doesn´t appear. I made it necessary under Customer>direction. It doesn´t appear with the default theme nor my new theme with prestashop v1.5.6