Early Release Approval from TCS

Hi All,

I am currently serving notice period (40 days completed) and asked for early release on 30th September. My manager has accepted the request and shared an email with HR about the early release.

HR told me that an early release request was sent for necessary approval and once approved he will tell me my Last Working Day.

How many days this approval may take and who needs to approve it.

Please share some info if you know about this process