Hey @Michele Paiva67! Sorry for the trouble. Deleting the form in ConvertKit won't suffice to remove it from your site; you also need to locate & remove the form embed code wherever it's been added to your website. Unfortunately, we don't have a way of automatically identifying everywhere the embed code may have been placed; it would be a manual process of locating & removing it from the backend of your website. That said, common places where it might be are are post editors, page editors, and widgets (such as sidebar/header/footer). But ultimately it'll depend on your theme, site structure, and where/how you originally embedded the form(s).
I hope that helps clarify! :)