Need ration card name addition

Hi all,

Iam  from chennai (Tamilnadu) and my wife is from kerala. We both gt registered marriage in tamilnadu (chennai). Now my wife's family is not giving ration card to delete her name in kerala state. Now i need to add her name in our ration card tamilnadu we have marrige certifcate in tamilnadu. can any one suggest how to get her name addition in tamilnadu ration card.

Thanks &Regards