OF COURSE........VINOD GUPTA SIR.........HE IS PRACTICAL ORIENTED......

AND....ABOUT GIRISH AHUJA SIR ......HE FOCUS MORE ON THEORY RATHER THAN PRACTICAL......

AND, FOR THEORY U CAN BUY HIS BOOK........

ABOUT VINOD GUPTA SIR

Qualified Chartered Accountancy in November 1986 with rank in the C.A. Intermediate and C.A. Final Examination.

Awarded prize for the best paper on Taxation in C.A. Final Examination.

Has authored around 100 articles on taxation in various journals and newspapers including Taxman, Current Tax Reporter, Chartered Accountant, Economic Times and Financial Express.

Has presented papers on Taxation in various seminars of the Institute and also in the seminar organised by the ITAT Bar Association.

He has been the Secretary to the Fiscal Laws Committee of The Institute of Chartered Accountants of India for 8 years.

Currently teaching CA Final students in Northern India. Having vast experience of teaching Direct tax, faculty at New Delhi for last 18 years and also a visiting faculty at WIRC of ICAI.

Practicing in the field of Direct Taxes. Working as Tax Consultant to leading Nationalized Banks, Multinational Companies and Indian Companies.

Worked as Senior Technical Officer for in the Institute of Chartered Accountants of India. Technical Directorate, New Delhi. Assisted the Expert Advisory Committee in formulating opinions on problems relating to tax of members and industry. Rendered services for the Taxation Committee and Research Committee of the Institute. Also, drafted the Guidance Note on Tax Audit under Section 44AB of the Income-tax Act, Guidance Note on Sections 80HHB and 80HHC of the Income-tax Act and other Guidance Notes.

Go for VG sir classes.

For preparation of Tax theory you may also refer Girish Ahuja's book later on. 

All the Best

of course V.G Sir