Hello Sai teja

I hope you are doing good. I would like to know you that TNEA process generally begins in the end of may just after 12th exams . Admission in TNEA colleges is done through the Marks scored by the candidates in the presrcibed subjects (PCM) . Counselling of tnea is done in four rounds , before each round list of eligible candidate for next round are made.  Based on the number of forms filled and no. of seats a cutt offs is sets and then final merit list for the students who are shortlisted

For brief details kindly go on the link below

https://engineering.careers360.com/articles/tnea-counselling

If you have any other doubt then you can always reach us to clear them :)

we are always available to help you out and guide you

Thankyou