Hey aspirant, Sorry to disappoint you but there is no chance now for applying for Jee mains this year. If you are willing to improve your rank then you will have to wait for 1 year that is you will have to drop for a year or else you can look for colleges on the basis of your previous rank which you secured in January session of Jee mains.

Hope you will understand.

For any further doubt regarding this please ask in comments.