The government has made quoting of the biometric identity number - Aadhaar - mandatory for opening of bank accounts as well as for financial transactions of Rs 50,000 and above. Linking of Aadhaar card is not limited to banking or financial transactions. Story Highlights Aadhaar is now mandatory for filing of tax returns and applying for a PAN The 12-digit number, Aadhaar, is issued by UIDAI Users need to link their bank accounts with Aadhaar by December 31 Aadhaar - the 12-digit number issued by UIDAI - is now mandatory for filing of income tax return and applying for a PAN. The government has also announced the deadline for linking existing bank accounts with Aadhaar. Failing to link your Aadhaar card with your bank account by December 31 this year may even make your account inoperable. The government has made quoting of the biometric identity number - Aadhaar - mandatory for opening of bank accounts as well as for financial transactions of Rs 50,000 and above. Li...