Hello Deeksha ;

Your eligiblity to give NEET doesn't depend on your marks that you've attained in your BSc course. Even though you've failed your BSc first year there's nothing to be worried about.

You can go to the NEET website and fill the form as per usual. Only there'll come a place where they would have asked you to provide qualification code. Just go with "05" as your qualification code and fill the whole form.

Hope this helps!