Hello aspirant, hope you are doing good. 

So all you have to do is to go to ntanneet.nic.in . You need to login by entering your registration number and password for the exam. 

Firstly, the correction dates were till 31st of May, it is then the sole responsibility of the candidates to verify the details. 

Since now the last date has gone you may have little chance to change. Still you can call their help desk for further information. 

Hope my answer helped you. Feel free to comment and ask more questions