That should be *goto ten_or_twelve
and then later on in the text (in the place you want it to jump to):
*label ten_or_twelve
I highly recommend working through a tutorial. People can probably recommend the best one, but possibly
http://www.maderealstories.com/game/ChoiceScriptTutorial.html#.1g
could be useful.
See ChoiceScript Full Tutorial (finished!) for a discussion of that tutorial.