My son's dob is 14.03.2022. For which class is he eligible to take admission in 2026-27 session

According to your son's date of birth (March 14, 2022), he will be 4 years, 0 months, and 17 days as of March 31, 2026; therefore, he is eligible for KG (Pre-Primary) for the 2026-27 academic session.