If you dont have the domicle of Tamilnadu then you wont be able to get admission in Govt colleges but yes, you can apply for private colleges without having any residential proof of TN. To know about the TNEA eligibility, you can go through the below link -
Eligibility Criteria
Hope this helps!!!
Candidates can check B.Tech Cut off for Top IITs & NITs here.
Counselling | Application | Exam Pattern | Admit Card | Result | Answer Key | Cutoff
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile