Lists recognise just about all the syle attributes, so you should be able to define any margin you like
margin-left: 0px;
or margin: 10px 10px 10px 0px;
If you're having difficulties with this, check that you don't have another syle definition that is overriding the style on your list.
It might also help to get an answer if you send an example of your code or a link to a page where people can see it.
