For correction in almost every entrance they create a correction window in their website but if you already missed that chance also then you can directly consult with official.But yo don't have to worry when document verification will be done in counselling they will correct this.

Best of luck.

in case of jee one should be particular in filling the application form because that was carried by the central board if any wrongs goes in your details make sure you have the id proofs for the change you have to made and it will be happen in the certificate verification time so dont think about it prepare well for your exam take you exam clean mindly without tension all the best hope you understood