Hey Hemanth,

You can correct your mistake, you can edit your application form logging into your account there will be an option for editing your application form, but you can edit only if you haven't paid the application form fees. Otherwise you can face problems.

It will be more better if you try to contact to the concerned authorities and tell them about your problem they can guide you better, you can contact them through their official website of TNEA.

I hope this information is helpful.

All The Best !!!