The Central Board of Direct Taxes (CBDT) would now communicate with taxpayers using the unique document identification number (DIN), which is expected to bring transparency and accountability to the process as such correspondence would leave an identifiable trail, the government said. On the first day of the mandatory use of DIN on October 1, the income tax department generated 17,500 DIN-compliant notices, letters, orders, summons and other correspondence. “From now onward, every CBDT communication will be required to have a documentation identification number. The system would ensure greater accountability and transparency in tax administration,” finance minister Nirmala Sitharaman said in a tweet.