Where is the OBD II connector on 2009 toyota corolla?

You can find any late model OBDII DLC under the driver's side of the dash.
It will look similar to this:

Attachment 35619

It may be mounted right side up, upside down or even sideways but it will be out in the open when looking under the dash on most late model cars and light duty trucks, 1997 and newer.