I am from Bihar am I eligible for counselling in tamilnadu government medical college
As you know admission to government medical colleges is based on NEET marks is done under two categories-All India quota(15%) and state quota(85%).
The state quota is only available to students having domicile of that state and not for outsiders. Since you belong to Bihar , you are not eligible to get state quota seats in Tamil Nadu. However if you have high enough marks you can go fo All India Quota seats in Tamil Nadu.
Counselling process for most of the states has started.
To know more follow this link-
https://www.google.com/amp/s/medicine.careers360.com/articles/neet-counselling/amp
Good luck