Can't find where you plug the computer to check the check engine light

Depends... what has the check engin light that needs checking. The ones that have them are usually on the drivers side low on the dash... pre-odb2 cars don't have universal ones and really old ones don't have any at all.

Very true what smoothy is sayin'. If we knew what year you have, and what make you have, and what...
If it's a 1995 and older, then you do not have OBDII. But there are still ways we can help you.
All you have to do is help us to help you.

Guess it wasn't too important or they don't know what kind of car it is... they never came back with an answer.