Hi Kanak

No, after getting the SSC CHSL admit card, you are not allowed to correct your wrong category because the SSC CHSL correction window has passed. You have two options: first, you need to contact the regional office of SSC, so that they can help you to change your category and provide you new admit card. The second option is that you can tell your problem to the exam authority and give the exam in the wrong category. If you know more about it, you can read the article ( SSC CHSL exam guide ) from our official website, careers360.