Go to the forum where you want to post the poll and click on the "New Thread" button. I suggest you try this in the
Testing Area first.
Near the bottom of the page, you'll see a section for "Additional Options" such as attaching files and subscribing to the thread. At the bottom of the list is a checkbox for "Post a Poll" together with a field that allows you to specify the number of poll options.
When you submit the thread, you will be asked to enter the text for each poll option.