Hello aspirant,

You can give any number of choices. Just be sure that you give more number of preferences it will increase your chance of getting a college in first counseling itself.

When you're participating in TNEA Counseling you will be asked to register in TNEA portal.

Login to the portal with your ID and password and
fill all the college preferences which you have prioritized based on ranking.

Be sure that you have choose good colleges first and choose only those branches in which you are interested in.


Checkout the below link for detailed procedure
https://www.google.com/amp/s/engineering.careers360.com/articles/tiet-btech-admission/amp


Hope this is helpful.
All the best!

https://www.google.com/amp/s/engineering.careers360.com/articles/tnea-counselling/amp
Dear aspirant,please  refer the above link for all the details.
You have to do the register then you have to do the payment then fill the personal details there and you have to do the document verification and they will make the merit list and counselling starts
Thank you

Tamil Nadu Engineering Admissions (TNEA) is conducted by Directorate of Technical Education (DoTE), Tamil Nadu for B. E. /B.Tech aspirants who are waiting for state level counselling. You can check out all the related dates with the below link.

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

Hope it will help you!