The Directorate General of GST Intelligence (DGGI) booked three firms, namely Fortune Graphics, Reema Polychem and Ganpati Enterprises for tax evasion of more than ₹600 crore. "They issued invoices worth more than ₹4,100 crore wherein tax amount of more than ₹600 crore has been fraudulently passed on as input tax credit," officials said. Three persons have been arrested.