Hi aspirant,

See it is all ok if you were not prepared and did not appeared for the JEE main 2021 examination but it is important for you to note that the current eligibility criteria set up by National testing agency says that a candidate can appear for JEE main examination in three consecutive you starting from the year the candidate appeared for the intermediate level examination. So your one out of three attempts got over even if you did not appear for the paper

Now going along the defined criteria you can now appear for the JEE main in years 2022 and 2023 only.  Also you now have only 1 attempt left for JEE advance examination that is in year 2022.

Also to boost up your preparations and gaining confidence follow the advice from our experts at JEE Main 2022 Preparation Tips - Know Study Plan, Important Topics, Books (careers360.com)

Hope it helps!!