Hey 

if you have a domicile of Maharashtra obviously you should go for state counselling of maharashtra only because there are a lot of seat & your chances of selection are greater if you score good.

85% quota makes you eligible for the state counselling

15% AIQ makes you eligible for all india quota. 

Good luck! 

In the NEET UG Examinations, State of Eligibility means the code of the state where you passed or graduated your 12th grade from or a 12th grade equivalent qualifying exam. So, if you are a Maharashtra domicile and passed your 12th grade then fill it as Maharashtra.