The correction Facility for JEE Main application Forms is over by Now for JEE Main January attempt. The application form for April attempt will be made available from Feb8, Onwards. Yes, You can fill for JEE Main April attempt. Mark, You date for Feb 8, To fill the form.

If you have applied for January Session then Correction window to edit your form has been closed now. For April session the application form is expected to come out on 8th February, 2019. You can check the further information with the given below link.

https://engineering.careers360.com/articles/jee-main-application-form

Good Luck!