Full steps on how to change or correct your name, gender, surname, Photo ID card type and photo ID card number, date of birth or date of year, just before taking the vaccination. This is applicable even if you have scheduled the vaccination or even if you have not scheduled the vaccination, but just registered in COWIN.
While registering in COWIN portal or aarogya setu it is possible that you had given a wrong name, or any other parameter like your ID card details.
So you can change it quickly online within minutes. You can change all the above data or you can correct only partial data.
This will also help people to change their ID card type. For example say you have registered vaccine with your PAN ID card type, but now you want to change the type to passport since you need passport number in the vaccination certificate, to travel abroad.
The COWIN portal link is: https://www.cowin.gov.in/