Answered on March 18,2020
Your PAN will become inoperative from April 1, 2020, till the time it is linked subsequently. Once your PAN has been linked with Aadhaar, then your PAN will become operative again from the date on which PAN has been linked with Aadhaar. It is only advisable to link your PAN and Aadhaar before the March 31 deadline to avoid cancellation of PAN card which might result in delays in further operations.
The person found using canceled PAN card, could be fined up to Rs 10000 as per section 272B of the Income Tax Act. That means PAN Adhaar link is a must and that too before the last date goes by. The last date to link your PAN and Aadhaar numbers is 31 March 2020.