Dear student,

The minimum educational criteria for SSC CHSL eligibility is to have passed the 12th standard or an equivalent examination from a recognized university or board. You need to be 18-27 years old on 1 January of whichever year you are giving exam. So probably from next year you are eligible as per age requirements.

For more details check on the below link.

https://competition.careers360.com/exams/ssc-chsl#:~:text=According%20to%20SSC%20CHSL%20eligibility,from%20Science%20Stream%20with%20Mathematics.

Hope it helps!