The income taxpayer base moved up substantially to 62.6 million at the end of the last financial year, from nearly 40 million earlier, the Central Board of Direct Taxes (CBDT) Chairman Sushil Chandra said on Monday. Clearing the air on disclosure of bank account details of nonresident Indians (NRIs), expats, as well as foreigners with investments in private equity in India, Chandra also said such accounts need to be disclosed only whenarefund is due to the assessee. The chairman of the CBDT said after demonetisation the department has takenahost of measures to increase tax base and the statement of financial transaction (SFT) report filed by banks shows widening of taxpayer base. “As on date, we have got 62.6 million assessees. These assessees who have filed returns, paid advance tax or tax has been deducted at source. This is a large jump from earlier years,” he said, speaking at the Income Tax Day celebrations here. The challenge before the taxmen now remains how to