To apply to university you must just write your toefl in applicationor add this as score recipient account?

You usually need to add your TOEFL score as a score recipient account in your university application. Simply writing that you *took* the TOEFL isn't sufficient; the university needs official proof of your score. The TOEFL organization will send your score directly to the universities you designate as recipients when you register for the exam. You will specify the university's code during registration.