Hello Aspirant,

See sports quota is not offered by all the counselling authorities but only by some states and since you have not mentioned the name of state for which you are seeking information so it is little bit difficult for us to guide you with an accurate information but in general if there is sports quota in NEET UG counselling for the state through which you are seeking admission then you would get an option to upload your sports achievement certificate and other documents while registration process of counselling. For mop-up round some states have registration process but some states do not have registration process for mop-up round but they take only those candidates for mop-up round who have already been enrolled from earlier rounds. So you should check with your counselling authority.

I hope this information helps you.

Good Luck!!