Dear Raj, you need to complete your graduation to become an Income Tax officer or work in the Income Tax Department.  You can appear for UPSC, and then select Indian Revenue Service (IRS) and join directly as a Group A officer in the Income Tax Department. Alternatively, you can also appear for Short Service Comission SSC CGL and once you clear the exams, you will be posted at the rank of an Inspector. Hese are the gentlemen who raid various places like the ones we see and hear about.  For both the ways, you need to be a graduate. There are no such colleges that train you to become an Income Tax officer but there are Coaching centres which cater to UPSC and SSC.