Hello Vishnu!

You can edit your application form logging into your official account .There will be an option of editing the application form .Try it once..

In case its not present there you can contact TNEA 2019 OFFICIAL WEBSITE:

I hope this will be useful to you!!

Dear Sir/Ma'm, the TNEA authorities will definitely give a date during which you can correct whatever wrong you had entered in the first bout of form filling.  Till now there is no notice of anything as such but they will definitely release a date because many students make mistakes in filling the form