Visit the CoWIN portal: https://www.cowin.gov.in
Open the Aarogya Setu app or Umang app
Enter your mobile number and verify with OTP
Create or log in to your account
Search for vaccination centers in Kolkata by PIN code or district
Select a nearby center and available date
Choose the vaccine slot and book an appointment
Carry a valid photo ID to the vaccination center
For walk-in registration, visit an eligible vaccination center if allowed
Check local Kolkata health department or hospital websites for updated booking options
Call the nearest government hospital or vaccination center for slot availability
Keep your mobile number active for OTP and appointment confirmation
Save or download the appointment confirmation after booking