Ann, you can change your name in the NEET application form  during the correction window. Login to the official website: ntaneet.nic.in with your NEET registration number and Password. Now click on " Correction in NEET application form" and make the desired changes to your application form. . Once the correction window has been closed,  NTA does not guarantee that any request for change in information will be entertained. So it is the best thing to make a note of all the corrections that you need to make when the correction window opens from January 15th to 31st and click on the "Final Submit" only after making all the changes that you want to. Once you click on "Submit", enter the OTP number.