If you have more than one PAN, whether acquired intentionally or inadvertently, you run the risk of being penalised. Following government's mandate to link PAN with Aadhaar.
Tax Information Network (TIN) is an initiative made by Income Tax Department of India to modernise the current system for collection, processing, monitoring and accounting of direct taxes using information technology.
A digital signature is a mathematical scheme for demonstrating the authenticity of digital messages or documents.
Aadhaar seeding is the process of linking Aadhaar Card with Other Government Official documents like Pan Card,Voter ID card and Also with the individual’s Bank Account you can check here how to link your Aadhaar Card with your Bank Account