Hey,

After successful completion of a bachelor’s degree programme, you become eligible for appearing in UPSC examination. Qualifying this examination will lead you to income department. You are required to prioritise the areas of civil services, if you want to join after selection such as Indian Revenue Services, Indian Administrative Services, Indian Foreign Services, Indian Police Services and other roles.

Those who qualify UPSC prelims examination are eligible for appearing in UPSC mains examination. On qualifying mains examination, you are called for interviews. Final selection for Union Public Service Commission Examination is made through evaluation of candidates performance in the interviews.

You can also check the link below to get a detailed analysis of the same-

https://www.careers360.com/careers/income-tax-officer

Hope this helps.