How to change project, when manager not want to release employees..?

No work, Low work... Get Release + Worst Band

First of all be clear why you want to change project. If it is related to skillset mismatch you can speak with higher level or HR, if it is related to work pressure you can discuss with manager and sort it out. Getting project release is a big challenge in TCS, but if your reasons are valid then you can get

First, have a calm discussion with your manager. If that fails, escalate to HR with documented requests. As a last resort, consider resignation.