Institute of Cost and Works Accounts of India offers the ICWA course. After b.com you can directly appear for intermediate course of it. Following are the details of it:

The ICWA course has following three stages:

Foundation
Intermediate
Final

Eligibility:
The applicant should have cleared 10+2 from recognized board or equivalent qualification. Graduate can skip the foundation level.

Documents required at the time of admissions:
10th & 12th Certificate and Mark sheet
Any Bachelor Degree completion proof