It is mandatory to link your PAN with Aadhaar by the end of this year, the Income Tax Department said in a public message on Sunday. "Building a better tomorrow! To reap seamless benefits of income tax services, complete the vital link before 31st December, 2019," the department said. It is mandatory to link your PAN with Aadhaar, according to the public message issued a fortnight before the deadline ends. The deadline to link the permanent account number (PAN) with Aadhaar was extended till December 31 by the Central Board of Direct Taxes (CBDT) through an order issued in September this year.