Hello Aspirant,

Unfortunately, now you cannot appear for JEE-Advance 2021 because your passing year will be considered as 2019 and according to the rules you was only eligible for JEE-Advance 2019 and 2020 and that too only if you have secured 75% in class 12th boards and also qualified JEE-Main then but now for this year even JEE-Main's last attempt is remaining only and with 2019 passing year you would not be eligible for further JEE-Main from now onwards, so if you have registered yourself for JEE-Main 2021 upcoming attempt then this would be the last attempt of yours for JEE-Main.

For more details regarding JEE-Advance eligibility criteria kindly check out the link given below :-

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

I hope this information helps you.

Good Luck!!