no there would be announcement of dates for apllication correction .you wont be charged any extra fees

Hello,
The application form correction window for JEE mains 2020 has been extended by NTA till July 20, 2020.
An additional fee payment is required dependingon the changes made in the form, the final updates will be reflected after the payment. The additional amount (if applicable) can be paid throughCredit/debit card or Net banking.

You can also change exam centres and other details.
Please note that while uploading photo and signature be sure to follow the necessary guidelines.
For more details please visit this link https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/jee-main-application-form-correction/amp&ved=2ahUKEwjHufSQptnqAhUD7XMBHWX1D2cQFjAEegQIAhAK&usg=AOvVaw1s_HFC5XlL5HB_za3JPO-b&ampcf=1
Hope it helps

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