Hello Student

You have to first contact in the correction window for how many number of days it will be opened for correction. After getting confirmation the time period and the days it will remained open you should contact with the authority of National testing agency to give you the option for correction of your order of names on the  photos you have submitted for Neet ug exam application. According to their instruction you have to make corrections or replace the photos if they  give option for replacement of photos and paste another with correct sign is order of names that NTA had instructed.. I hope they will give you the good advice to solve your problem.

Hope this helps.