Hi aspirant,

According to the current age guidelines set up by UPSC, the body which conducts the CDS examination a candidate needs to age between 20 to 24 years to be eligible for CDS Indian military services. The minimum educational requirements for the same is to be a graduate from a recognised university or college. You can see the complete details for the eligibility criteria for the various posts through CDS in the table below:

CDS age limit criteria for UR candidates

As per the age mentioned by you you are eligible to write the examination for 3 mod x including this year until you are 24.

Hope it helps!!