Hey Akhila!

If the correction portal is open, you can correct your mistakes in the academic portion. And if the correction portal is yet to open then you can wait for the duration and correct any discrepancy after the opening of admission portal.

In case, the college or University does not provide the option of correction portal, then you may have to reach the helpdesk by calling or mailing through the email and phone number provided on the respective website. Take guidance from them and in case, the registeration portal is still open, then you may be asked to apply fresh depending on the discrepancy.