Hello Aspirant,

See in your case you should enter the roll no./seat no. of HSC 2020 because your first passing year of HSC was 2020 then only you can opt for 2 as your number of attempts for NEET UG. If you have better marks in your improvement examination for which you appeared in 2021 then also it won't affect your eligibility but what you need is at least 50% in PCB combination and you should carry your HSC 2021 improvement marksheet as well while document verification process.

I hope this information helps you.

Good Luck!!