Hello,

You can appear for the CBSE improvement exam in the same year if you have already passed the board exams. The CBSE typically allows students to appear for improvement exams in the same year, but you'll need to check the specific dates and eligibility criteria.

If you're planning to appear for the improvement exam next year, the application forms are usually released in May or June, and the exams take place in July or August.

https://school.careers360.com/boards/cbse/cbse-improvement-exam