Dear aspirant,

As you have mentioned that you are worried if you miss the 75% criteria and you want to appear for improvement examination so let me tell you that the examination will be conducted before jee mains and if by chance it's not conducted , the documents will asked from you during the counselling and documents verification and not at the initial stage.

To get more information you can check out the link given below-

https://engineering.careers360.com/articles/jee-main-eligibility-criteria/amp