Huf

My father make a Fixed deposite with monthly interest return from Huf....He was karta & myself and my only son r members.Last year my father is no more...After submitting his death certificate in bank Now I am a karta of same Huf (for Fd) Now bank is asking for 15 G form...so should I submitt my fathers Huf Pan or open a new Huf Pan in my name ? I not filling IT return of Huf because only income of Huf is interst income from bank which is less than 40000 per year