Huf bank a/c operation post demise of karta

Hi, 

My father has created a HUF deed with him being a Karta,  and my mother and myself (adult son) as coparcener. However, while opening the Bank A/c he just mentioned my mother as a coparcener since I was not physically available for signatures.

Post my father's death, how can that Bank A/c be operated. Can my name be added now as a coparcener/Karta in that Bank A/c. Can I open a new Bank A/c with the same HUF name?

Thanks

Kamal