Non filing of income tax return notice

hello ,members! I have received a notice for non filing of income tax return for a.y 2013-14 and the said notice requires me to give response on compliance tab of the portal. actually I only did intra day trading and suffered loss during the period and moreover I was not in tax paying bracket.what should I do now? what should be the response considering I did not file the return for trading loss? plz reply.experts and members are requested.im a ca student.