Hello,
You don't need to worry for this as jee will provide a link on their website through which candidates can correct/edit their particulars filled at the time of registration.So you can also change your year of passing class 10th exam also.For more details keep regularly visiting jee mains website.
http://www.jeemain.nic.in
All the best!:)

Dear Siddarth
Yes,  in the month of January you can do the corrections.
With that you can also change, these.
The correction in particulars can be done only if the
candidates have paid the fee and completed all the steps of online application form of JEE (Main)  2018. The candidates can modify all the particulars including city of examination, Paper - 2 to Paper -1 and vice versa or select both papers of his/her application form during the facility of correction in January, 2018. The balance fee, if any due to correction in particulars, will have to be paid by the candidates during that period. However change of mode of examination from
computer based.
And also you can change your Aadhar number too.
It's only possible once,  please go through.
All the best.

You can correct all the details in the january month 2018,

For more faq's regarding updation of details please go through : 

https://jeemain.nic.in/WebInfo/Handler/FileHandler.ashx?i=File&ii=87&iii=Y

Good Luck !!!

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