The Indian Revenue Service abbreviated as IRS, is the administrative revenue service of the Central Civil Services of the Government of India

You will have to take up the Civil services exam (The same as for IAS, IPS etc)

Once u clear the priliminary, you will have to prepare for the mains

While choosing the options (such as IAS, IPS, IFS etc), you will have to choose IRS (Indian revenue Services)

If u clear the exam & the interview, you will become the Commissioner of Income Tax..

Indian Revenue Service deals with the matters concerning Income Tax.

Indian Revenue Service Eligibility

The eligibility criteria for the Indian Revenue Service exam is the same as for other services. Once the candidate clears the civil services and gets allotment to the Indian foriegn service as per his rank, he has to go through specified training.

Designation Pay Scale

Principal Chief Commissioner of Income Tax Rs. 80,000 (fixed)
Chief Commissioner of Income Tax Rs. 75,500-80,000
Principal Commissioner of Income Tax Rs. 67,000-79,000
Commissioner of Income Tax Rs. 37,400-67,000 + grade pay of Rs. 10,000
Additional Commissioner of Income Tax Rs. 37,400-67,000 + grade pay of Rs. 8,700
Joint Commissioner of Income Tax Rs. 15,600-39,100 + grade pay of Rs. 7,600
Deputy Commissioner of Income Tax Rs. 15,600-39,100 + grade pay of Rs. 6,600
Assistant Commissioner of Income Tax Rs. 15,600-39,100 + grade pay of Rs.5,400