Registration for inoculation will open any day now for senior citizens.Pl keep watching the CoWin site and app linked below. As yet both are only open for viewing and login by vaccinators. But the option to register could pop up sometime after Feb 15. When it does, you can register with your PAN card no and other details as required. You will be able to opt for the hospital most convenient to you. Once accepted, you will get an SMS confirming your registration with a 14 digit registration no. In due course after that you will get another SMS giving you a date and time for vaccination at the hospital you opted for. If you are particular about which vaccine you would like to take, pl check with the hospital of your choice about which one they are allotted. https://www.cowin.gov.in/home