Changes

At the time GST Migration Internetcafe operator uploaded his own Mobile number&email id uploaded in the portal.In home page under contact details in profile section shows the above Mobile number&email id.Now Ian facing to get OTP facilities.How can change Mobile number &email id of mine and getting OTP in my own Mobile number & e-mail I'd.Please tell me the step by step action done and also how much time to be taken the changes in activation.