You need to create your Personal Study Plan (PSP) and Annual personal Study Plan (APSP) at the beginning of each new academic year.
The online procedure is available on your personal page of the Teaching Portal - Online Services tab, portlet Create your Personal Study Plan/Annual Personal Study Plan and Enrol in the new academic year. The procedure is guided. You can repeat it as many times as you wish until the dedaline. The procedure ends with enrolment.