To become CA,

Register for CPT: Register with the Institute of Chartered Accountants of India (ICAI) for Common Proficiency Test (CPT) after passing class 10th examination. Appear and Pass CPT: Appear for CPT examination after appearing in 10+2 examination and after completion of period of at least 60 days from the date of registration for CPT with the Board of Studies as on the first day of the month in which examination is to be held, viz., students registered on or before 1st April/1st October will be eligible to appear in June/December examination, as the case may be.

Hope this helps.

Good Luck.