Dear Sushmita, CA is one professional course which doesnt have any reservation for candidates of any category. You become a CA by the virtue of your merit and not by any category. So even if you belong to OBC but have filled in the application form as General Category student, it is still fine. There is no damage being done to your profile/application.

Hi Sushmita,

Yes, You can do CA Founadation registration with general category, If you willing to fill form under OBC category then you have to submit attested copy of cast certificate along with online registration form.