The income-tax (I-T) department will crack down on “shell” or “jamakharchi” (deposit and withdrawal) companies that are used as money laundering tools. The Central Board of Direct Taxes (CBDT) recently took a decision to focus on such companies as well as individuals and entities engaged in such activities, sources said. These operators have “laundered several hundreds of crores of black money and have earned commission income,” sources told HT. Kolkata-based tax authority , directorate of investigation, in its findings has said that a chunk of operators work from Ahmedabad, Mumbai, Hyderabad, Delhi and Bengaluru. “Principal chief commissioners of income tax Ahmedabad, Mumbai, Hyderabad, Delhi and Bengaluru have been asked to take a suitable action against persons who had laundered black money with the help of such operators,” sources said. According to the tax department investigations, these operators work through shell companies, which do not have any genuine business, and a