Anti theft reset?

I need to reset the anti theft system in this 2005 Kia Sorento.
The auto entry key would not work so we did manual and set everything off, now I do not know how to reset. Please help! I unhooked the battery to try to restart and that made things worse. It says there is a override button under dash, but I cannot seem to find one. I need to know how to reset set this thing I need my car. I have kids and need to get to work. I am sure it is simple, but I cannot seem to get it. Please help me reset this anti theft system.