Hi shanejeffery86,
There are several ways to find that out.
Depending on your rewrite rules, your urls may be configured like this;
www.myforum.com/f12/.
'
f12' is the forum id. Also, if you go to the forum manager page in admincp, when you hover the cursor over the specific forum, it will tell you the forum id in the status bar at the bottom of your browser, i.e.
http://www.myforum.com/forums/adminc...php?do=edit&f=12