direct tax

Go for a practicing CA 

My dear friend the Biggest Learning institution I. the world is YouTube and most interestingly it's absolutely Free.

Find videos on YouTube by simply typing "How to File TDS return" and you would see Hundreds of videos and very finely step by step details in that. Just go and hit the search.

Alternatively, If you want to make Tax profession as your career better to Join any CA firm and start working there.

Thanks. Be Helpful to One Another!