Hello Aspirant,

See your qualifying year will be considered as 2019 because for first time you had appeared for class 12th examination in 2019 and therefore you were eligible for only JEE-Advance 2019 and 2020 but as you got failed in 2019 so you missed the chance to sit for JEE-Advance 2019 but if you had passed your class 12th in 2020 as a private candidate in second attempt then you were eligible for JEE-Advance 2022, provided that you had qualified JEE-Main 2020. So now you cannot appear for JEE-Advance 2021 even if you qualify JEE-Main 2021.

For detailed eligibility criteria of JEE-Advance 2021 kindly check out the link given below :-

https://engineering.careers360.com/articles/jee-advanced-eligibility-criteria

I hope this information helps you.

Good Luck!!