Dear Angela, once you qualify in NEET, NTA will release the merit list. And every state has 85% for candidates who fulfil the domicile criteria and 15% for All India quota. If you are from Kerala and you fulfil the domicile of Kerala, ypu can only participate in the 15% All India Quota for a Medical seat in Tamilnadu. After NEET, every medical college will release its cut off and so will Madras Medical College. If you fulfil their cut off, you will have to register and apply for their college and also register for All India Counselling. In the counselling, based on your rank, score and category, you will be given a seat.