First, you need to complete wind up process of your company. In common parlance we talk, Private Limited Company never dies. It is very difficult to wind up the Private Limited Company. Some one expert will guide you the process of winding up your Private Limited Company.
Only after winding up your Private Limited Company you will surrender all your Social Security Codes to respective authority. Till such time, you will have to submit nil return periodically. You will have to pay Rs. 5/- and Rs. 2/- every month to EPFO towards EDLI and EDLI admn. respectively.
Sub-codes allotted to your other establishment(s) can be surrendered on closure of it. First you need to surrender the registration of your such establishments. If the establishment is Factory under FA, surrender the Factory Licence and if it is a commercial establishment i.e. office then surrender S&E registration.
This is the way you should go legally. You may find the respective office telling you something different.
19th April 2014 From India , Mumbai