Here is the eligibilty criteria of TNDALU- 

Candidates applying for 5 year Integrated program should  have completed 10+2 with 70% aggregate. 

• For LLB 3 year program candidates should have completed graduation with 60 % aggregate. 
• For LLM programme candidates must have a degree course completed with 45 % aggregate....  Candidates  waiting for their result can also apply.. .  

I hope this information will help you....  If you want to know more you can see this link. 

https://www.google.com/url?sa=t&source=web&rct=j&url=https://collegedunia.com/admission/36-tndalu-llb--llm-admission-2019-courses-appliaction-form-result&ved=2ahUKEwijiaiPrJHiAhUJXSsKHThOArQQFjAMegQIBxAK&usg=AOvVaw0gpgHhFIdMWCuuhq_CuKm8&cshid=1557505149331

Hiiiii Vinoth!!!!! Yes you can apply for TNDALU for LLB programme even in you final year. The eligibility criteria requires that you should pass with atleast 60% in total aggregation if you belong to unreserved category and otherwise 55%. Hope this helps. Good luck!!!!