Hiii

Please mention the course and field you wish to pursue so that we can help you in a better way.
There are different type of exams being conducted like NEET for medical, JEE for engineering, CLAT for Law, and many more state level and uniersity level exams like SNAP is conducted by symbiosis university for their courses. Also their is AIIMS MBBS exam conducted by Aiims New Delhi and JIPMER exam for getting admissin into MBBS courses.
Almost all the registration start by the end of december or january. So if you mention a bit of detail in your question like the course you are looking for we can help you better.

Thanks!!