Dear prashanth,

Don't worry about that ,

You face no problem regarding the wrongly filled details...

It makes no effect at the time of counseling ...

You can change in your admission time..

Good luck ~!

You can make the changes in your application form at the time of correction date. 

It is expected that CBSE will declare the correction dates in the second week of January 2018. 

It is recommended that you should rectify your mistakes. so, that you don't face any problem at the time of counselling.

To know in detail you can refer below link

JEE Main Correction Dates

Good luck!!