Dear,

The basic minimum eligibility criteria that candidates need to meet in order to appear for SSC CHSL is that a candidate must be aged between 18 and 27 years as of January 1, 2021, and should have passed class 12. Considering you are born in 2004, as of today your age will be 16 as of Jan 1,2021. So you won't be eligible.

Hope this helps!