Hello aspirant,

See if you wish to upgrade your seat you got alloted in previous round and if you can get the upgraded seat then the seat you got alloted previously will be become virtually vacant seat and will be available for other candidates. If you cannot get upgradation seat then the seat you got previous will be under your name.

Visit Official website.

https://mcc.nic.in/WebinfoUG/Page

For more information go through below mentioned link.

https://medicine.careers360.com/articles/neet-counselling

May this information was helpful to you.

Good Luck!!