Dear Chandra, you haven't mentioned the kind of msitake that happened in the application form. Neverthless, NBE will start its correction window tentatively in the 2nd week of November and you can edit your application. Having said that not all the fields can be modified. You cannot make corrections to your Name, Date of Birth, Gender, Category, Nationality, Mobile Number, Email Id and Exam City. If your error is one amongst these, you may have to re register with new Mobile number and Email Id. This may include another payment. But if the error is not one of these, you can wait for the correction window to open. For more information, please visit our page at: https://medicine.careers360.com/articles/neet-mds-application-form