Hiiii Abhish!!!! Congratulations for your marks in 12th. This year, NTA has released the minimum percentage that you require to get admission in engineering colleges. So if you belong to general and OBC and category you need a minimum percentage of 75% to get admission in IITs, NITs and other good government colleges. And if you belong to other categories, you need a score of 65%. Or you need to be in top 20 percentile.

Hi Abhish!
First of all, a very hearty congratulations on your score. To find out which engineering college you will get through your TNEA marks, you can use the TNEA college predictor that is provided by Careers360 through the following link:
https://engineering.careers360.com/tnea-college-predictor

This predictor utilizes your marks in 10+2 (PCM) marks and your community details to give an approximate list of colleges in which you may get admission. 

If you have any further doubts or queries, please comment below.

Let me know if this answer was helpful and all the best for your future!