There is no eligibility criteria. Probably just the YOE above 4 or 4.5 years
But whatever your manager tells you, that is the eligibility criteria for you.
Since you said you joined 2 years ago, i assume you have a good pay (compared to your peers in your project).
Considering that and only 2 years in TCS, the chances of promotion is highly unlikely.
You cant apply. You need to talk to your manager. Your manager wont say No.
Your manager may tell you that he is ready to raise next quarter. Then he will tell you there is no promotion for next quarter. Then he will tell you that he raised the promotion but it is yet to be approved. He will tell you for a few more quarters that it is pending with Corporate/HR.
You can ask and get to know the response but dont take the response seriously.