VFS Global Passport Tracking in USA

Passport Renewal application has been mailed to the VFS center last week, Still not received notification and getting “Invalid input” error on Tracking application. Any idea on How many days it takes to get a notification from VFS?

I got email acknowledgement from vfs after couple of days from the day I sent it through Fedex.
For tracking it on VFS website, use ARN number (Application id from Indian embassy) and not the vfs confirmation number.
Hope this helps.