Hey,

You will have to report to your alloted college after the counseling ends. You will be notified about that in advance and will be given a deadline date till which you will need to report to the alloted college in case you want to take admission in the respective college allotted to you.

Don't worry they will notify you about that. As far as your past records are concerned the NTA do keep records of every student about their attempts and marks scored

Hope that helps.

Thank you.