To apply for PAN card, you have to visit the official site of NSDL (https://www.onlineservices.nsdl.com/paam/endUserRegisterContact.html)
Here you have to write whether you want to make a new PAN card or make correction in the old one.Then add category.
After entering all thedetails i.e. Name, Contact, E-mail, you have to submit the application.
If the documents are found correct, you will get the PAN card within 48 hours.