I have passed my 10th in 2023 , after that in may I got admisson in a cbse board school, within 6 months I keep going to school but due to some financial problems I can't my fees regularly so the school stopped me to coming school, in 2024 I haven't got admisson anywhere else , am I able to get admisson in kv for 2025- 2026 session,

As unfortunate as your condition may be, you do not qualify for direct admissions to KV Class 11 for the academic year 2025-2026.

Incomplete Academic Year: You did not complete the entire academic year in your previous school because of financial reasons. This aspect might hamper your eligibility for direct admissions.
Lack of Formal Education: An unattended year in school like 2024 may deprive you of the wherewithal to get eligible for the Class 11 seat.
But If you want to seek admission in Class 10 then your minimum age must be 14 and maximum age 16 on March 31 2025 and you must be a Indian National.
However, possible options include:

Equivalence Certificate: You would be able to obtain an equivalence certificate from your previous school or a recognized board to certify that you are of the relevant academic level.
Bridge Course or Remedial Classes: You can enroll for a bridge course or remedial classes to enhance your academic skills and make yourself ready for admission.
Alternative Schools: Find other schools close to your residence that have more lenient admission procedures or provide scholarships.
You should contact the specific KV you are interested in and clarify their admission procedures and any possible exceptions in your case.