Hello aspirant,

You can directly give JEE Mains and JEE Advanced in 2023 , skipping of JEE Mains in 2022 will cost you one attempt down out of 3 attempts in 3 consecutive years. After qualifying JEE Mains only then you can appear in JEE Advanced entrance exam.

Yes, if you have valid score then you'll be eligible for IIST if you directly write JEE Mains and JEE Advanced in 2923 without attempting in 2022.

Yes, you'll be eligible for JEE Mains and JEE Advanced in 2023 and 2024 also as you would complete your 12 th standard in 2022 and if you meet other eligibility criteria like age criteria, minimum 75 marks in 12 th standard in science stream from a recognised Board and 65 percentage for reservation category candidates, etc.

You will be eligible for JEE Mains in 3 consecutive years from the year you finish your 12 th standard including that year i.e you are eligible for JEE Mains in 2022, 2023 and 2024.  JEE Advanced can be attempted twice in consecutive years.

For more information go through below mentioned link.

https://engineering.careers360.com/articles/jee-main-2023

You can check below mentioned link to get more information about JEE Knockout.

https://learn.careers360.com/knockout-jee-main-april/

I hope this information was helpful to you.

Best of Luck!!