To pursue BTech in Tamil Nadu after completing your diploma, the primary admission process is through TNEA (Tamil Nadu Engineering Admissions) . Here's what you need to do:

1. Eligibility :

   • You must have completed a diploma in engineering or technology.
   • A minimum of 50% marks in your diploma is usually required.

2. Examination :

   • TNEA is primarily based on your diploma marks .
   • JEE Main scores are not mandatory for most colleges in Tamil Nadu, but some private institutions may accept them.

3. Application Process :

   • Visit the official TNEA website to apply.
   • Fill in the application form with your diploma marks and documents.

4. Counseling :

   • Based on your marks, you will be called for counseling and seat allotment.