I can get below 75% in 12th 2019, then i go for improvement exams for all 5 subjects in 2020, but i give only 1 subject exam due to some personal reasons and absent in other 4,, then I eligible to give improvement exams in 2021.
Hello Aspirant !
As per the CBSE , improvement exam. can be taken only in the successive year of passing Class XII exams
So , you cannot appear for the exam in 2021.
For more information you can visit :
Hope it helps !