When you create a thread you will come across the "Submit New Thread" option, which of course submits your thread. Now if you scroll further down you find a section titled "Additional Options". Simply choose the "Post a Poll" option, tick the box, and choose the amount of options you want in said poll. You want to then click on the summit button below slightly below the poll options.
Once you've submitted the thread it will take you to an additional screen where you can choose your poll content and options such as deadlines etc. Hope this helped :yes: