hey there,

you can correct this by following steps

1.  firstly Visit the Official Site of NEET.

2.  Visit Candidates Login link.

3.  Enter your registration number and password.

4.  Then Click on the link for correction.

5.  Now, correct your filled details in the application form and click on final submit.

6.  One Time Password (OTP) will be sent to the registered number. Enter the OTP.

7. Take a print out for future reference.

you have to correct the mistakes carefully because no second-time correction opportunity will be provided further.