Hello aspirant,

If you have got 73% in boards then go and prepare for Jee 2022. NTA has removed 75% criteria for 2022. So this year you are free from worries. Don't repeat your academic year, this will be just a waste of your time and efficiency. But if you genuinely want to increase your percentage then you can give a improvement exam in any one of the exam you thing would be easy for you to score more. Improvement exam is a better option because it is possible that NTA may not remove 75% eligibility criteria for 2023. But then also you have many options. There are many best institutions in India which does not allows 75% in 10+ 12 boards. So IIT is not a only option. Choose wisely and think again.

Hope this helps you:)