Hello,

You have to do  bachelor's degree first which can be BA, BBA, BSc. There are many colleges which gives admission on the basis of CLAT entrance score exam and many college conducts it's own exam for selection.

After bachelor's degree , you have to take LSAT exam. then after you have to do LLM in taxation law from a law college.  it is a 3 year course. After completion of LLM, you can take BAR exam and work as taxation lawyer. it will have different section , you can choose corporate one or check the process to get corporate section for work.

Hope it helps!