As per the press release from SEBI dated 3rd September 2021, All the existing clients are mandated to link their Permanent Account Number (PAN) with their Aadhar Number on or before 30th September 2021. Failing to do so will result in the disablement of their Trading Account. In Simple words, If you do not link your PAN with your Aadhar by 30th September 2021, your trading account will be disabled from 1st October 2021. If you're yet to link them, visit here and complete the procedure in 5 minutes.