<s>[INST] By mistake I have been using different PANs for different purposes like one for my demat account and another for filing my Income-tax return and payment of taxes. How do I set this right? [/INST] ​It is advisable to retain only one PAN, preferably the one used for Income-tax purpose and surrender the other number immediately. The institutions where the latter number has been quoted should be informed of the correct PAN.​ </s>