Hey Shreedhar!
You don't have to report to the alloted centre, nor to the Admission Reporting Centre. You can slide or float a college, through your login portal.
Only when you want to confirm your admission, that is, when you freeze an option, in CAP round 1 or 2 or 3, then you have to visit the Admission Reporting Centre with your documents (verified at the Facilitation Centre) and subsequently at the allotted Institute.
Good luck! :)
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