I have 8 years of experience, recently I got an offer from TCS for 20lpa(22% hike).Currently I am working at Accenture and my project is not releasing me or providing me any hike.Should I accept tcs offer ?

Basically if you have good knowledge in the angular and react along with other technology you could get a package in range of 25-30 or more as well .but as you have 8 year experience you should be interviewing for team lead or architect position I guess ,so you should have a very good grasp on LLD and HLD concepts,design pattern and architecture concept as well along with the core dev technology

You can easily get in the range of 40-50
But you have to play the game Being from the service sector and underpaid category, people will low ball you a lot, so you need at least 3-4 offers. Or one start up offer, research around, know your worth and don't low ball yourself when the HR asks the expected salary, because some people do bet on people and don't care if you were underpaid.

All the best

Their work is to undervalue you .they want you in their organisation in less amount so they will always try to do this .I think you should accept the offer and juggle this offer for a better offer in any well established startup or any other company.

That' true we undervalue ourself. Let's hope for the best :) already I am quite upset with all of this and the behavior of my current manager towards me and these HR's

I work on frontend mostly Angular React.This particular interview they evaluated for Angular,js only