Question: how to change the aadhar card details online?
Answer: Step 1 : Visit Aadhaar Self Service Update Portal i.e https://ssup.uidai.gov.in/ssup/ ... 
Step 3: Now enter your Aadhaar number and Captcha Verification code from the given box.
Step 4: Now, click on 'Send OTP or Enter TOTP' which will be sent to the registered mobile number.