Hello,

Well that's a big issue because your date of birth on your Aadhar card should match with your class 12th and class 10th board results and then only you will be verified at your counselling. However there are some options that you have. One option is to get your aadhar card details corrected online.For this, you have to go to the official website of UIDAI. On the official website, you will be given the option to update most of your information and you can apply for change. Or you can visit any nearby e-seva kendra and request the authority for change of DOB in your aadhar card. You will be asked to fill a form and there Once you will fill the form get a stamp and signature from that authority and you can carry that form on the counseling date and show it and you can explain all the issue to them that you have applied for DOB correction and it will be updated soon.

I hope this helps.