By mistake I selected general category but i am from OBC category and i have already completed the payment process. Suggest me what i can do about it . If filling the form again is the only option then i will fill but please guide me regarding this.

Dear Abhidhek  Category comes under Personal details field of CAT application and this is one of the fields that you can chamge during the correction window whrn it opens during September 27th to Srptember 30th. But please do raise a Candidate Query on the official website and confirm it once. Also you can reach the helpdesk at
cathelpdesk@iimcat.ac.into get help. When you are able to correct it, please visit the official website and to the right bottom of the screen, you will find a heading called Certificate. Please download OBC certificate, take a print out. Manually fill it up, get the required signatures, scan it and upload it to your application form.