Touted to be India's most ambitious tax reform, it's crucial for the GST Bill to get passed in this winter session. If the GST Bill fails to get passed in this winter session the government will miss its April1, 2016 roll-out date of the same. CNBC-TV18's Shereen bhan reached out to P Chidambaram, Former Finance Minister to get a sense of where his party stood on the GST.