West Bengal Minister for Finance, Commerce and Industries Amit Mitra said today that hawala transactions are being conducted through the Goods and Services Tax (GST), adding that the input tax credit is actually black money. He also said that the GST was rolled out without full preparation. Mitra, speaking on Day 2 of Agenda Aaj Tak, was taking part in a discussion on the growth of Indian economy in which Union Minister of State for Civil Aviation Jayant Sinha and senior Congress leader Manish Tewari also took part.