Hello Aspirant,

You can definitely clear CSE conducted by UPSC in very 21st year of your age i.e. in 2027 if you follow the right track for preparation because still you have around 4 years left which is more than sufficient for any examination. You can register in the year 2027, because as per your DoB you will complete your 21 years of age in 2027 and the age limit for UPSC IAS exam is 21 year to 32 year(with following age relaxation as per the reservation criteria of UPSC) so you will be eligible from CSE 2027 examinations :-

>>>> OBC - 3 years

>>>> SC/ ST - 5 years

>>>> Defense Services Personnel, who got disabled during operations during hostilities with any foreign country or in a disturbed area and released as a consequence - 3 years

>>>> Ex-servicemen including Commissioned Officers (CO) and ECOs/ SSCOs who will render at least five years Military Service as of August 1, 2021, and have been released - 5 years

ECOs/SSCOs who have completed an initial period of assignment of five years of Military Service as of 1st August 2021 - 5 years

>>>> In the following cases: blindness and low vision, deaf and hard of hearing, locomotor disability including acid attack, cerebral palsy, leprosy cured, dwarfism, victims and muscular dystrophy, intellectual disability, autism, specific learning disability and mental illness - 10 years

>>>> Candidates ordinarily domiciled in the State of Jammu & Kashmir from January 1, 1981, to December 31, 1989. - 5 years

>>>> So as per the age criteria you will be eligible for UPSC IAS exam from 2027 because the candidate should have crossed age of minimum 21 years on the August 1st of examination year and you will cross it in April 2027.

You can check out the detailed eligibility criteria for UPSC IAS from the link given below :-

https://competition.careers360.com/articles/upsc-ias-eligibility-criteria

I hope this information helps you.

Good Luck!!