i had the problem that when I am entering the OTP in the NTSE registration form then there is showing that you have entered the wrong verification code even when I have entered the correct verification code
There might be some technical error with the website which you are using or there might be some network issue. So I would suggest you to retry it. What you do is just close that window and open it again and then retry it. If it doesn't work then please help us with your state in which you are going to appear for NTSE.
I hope this information helps you.