Visit the UIDAI website: https://uidai.gov.in
Click on “My Aadhaar”
Select “Update Your Aadhaar”
Log in using the child’s Aadhaar number and OTP sent to the registered mobile number
Choose the update option for biometric update
Book an appointment at the nearest Aadhaar Seva Kendra or Aadhaar Enrolment Centre
Carry the child’s Aadhaar card and supporting documents
Take the child to the centre for biometric update
Update fingerprints, iris scan, and photograph as required
Submit the update request and collect the acknowledgement slip
Track the update status online using the URN on the acknowledgement slip
Download the updated Aadhaar after the request is approved