Hello Aspirant,
Unfortunately you cannot change the uploaded documents in TNEA Counselling registration form because the authorities do not provide the facility of correction window and without correction window you cannot make changes in your registration form. So in this case you should contact the competent authorities they would help you with this issue. Also do this as soon as possible because on August 24th counselling registrations will be closed and then it would be much difficult to resolve this issue.
For complete details about TNEA 2021 counselling kindly check out the link given below :-
https://engineering.careers360.com/articles/tnea-counselling
I hope this information helps you.
Good Luck!!
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