Central Board of Direct Taxes (CBDT) Chairman Sushil Chandra said that so far only 230 million PAN cards have been linked with the biometric ID Aadhaar. He said that so far the Income Tax department has issued 420 million PAN. The last date to link the PAN with Aadhaar is March 31, 2019. Supreme Court had also mandated filing of IT returns with Aadhaar verification. "By linking with Aadhaar, We will know whether there are any duplicate PAN or not. And there are certain duplicate PANs... If it is not linked, we may cancel the PAN also," Chandra said.