As you want Steps to become CA after completing B.Com so here I am providing you the same

-For doing Chartered Accountant (CA), you have to enroll with the Institute of Chartered Accountants of India; the CA course has following three stages:

Common Proficiency test (CPT)
Integrated Professional Competence Course (IPCC)
Final Examination

-As you have completed B. com you will be exempted for the Common Proficiency Course, you can directly apply for the IPCC
-The eligibility criteria for the graduates to write IPCC directly is as under:
In case of a Commerce Graduate – 55%
In case of a Non-Commerce Graduate – 60%

-After Completion of IPCC group and Articleship, you can enroll for Final Examination
- After passing Final Examination, you will become CA