All the IITs will run preparatory courses of one year duration for SC, ST and PwD candidates intended to prepare them to pursue the academic program (for session 2017-18) to which they have been allocated. At the end of this course, candidates are declared as ‘pass’ or ‘fail’.

You can contact the Jee Advance authority when the process will start. Rest infor on the same you can even check below:

Preparatory courses

Hope this helps.