Click and know all about, PAN Card: How to Apply For PAN Card and How to Download PAN Card or PAN Card Status. Know all you need to know about PAN card, from how to apply for it to how to link aadhar and pan. Permanent Account Number – a 10-character alphanumeric identifier, issued by the Income Tax Department as a unique identity. It is basically an electronic system, which contains all tax-related information of an individual or a company. That further acts as a fundamental key that stores or contains tax-related information.