What is the salary that I can expect when I go back to TCS after doing my MBA from T.A.Pai Management Institute (TAPMI)? I have 2.5 years of experience with the company prior to availing LWP.

If you are getting an MBA at a reputable institution (let's assume tier II at least), you may be recruited as a consultant or a business analyst. You would receive approximately twice as much money as you did in your previous employment with TCS. It might rise more as well in a rare scenario.

Also, you have better possibilities to go onsite if you join TCS (or any other IT Firm) after receiving your MBA.