Hello Purbita,

NTA will only cancel the applications in case that the candidate has filled multiple online applications. So, be careful while filling the application form and do not fill the application form more than once. If NTA cancels the application, then there is no prvision for any correction and the amount will be refunded to the concerened bank. 

As for correction of apllication form details, do it within the correction window provided for the concerned exam.