I am unable to get sound when pluged into my computer, What am I not doing right?

You will need to give a lot more detail.
Do you mean that no sound is coming out of the speakers or that you can’t get sound in (recorded in Audacity)?
What are you trying to do?
What equipment are you using?
When did the problem start?

As a wild guess, does this answer your question?

I am using an Audio- Technica AT-LP60 Stereo Turntable. Trying to record Record Albums to transfer to cd’s. The problem has been from the very begining. I am very new at this. I went by the software guide but it still does not produce sound.

I still don’t know if you mean that you are not getting sound into the computer or not getting sound out of the computer.

Perhaps this tutorial will help: Audacity Manual