Need more info. So do you have like the werewolf template applied and you need to activate one of your forms? If so its on the In-Play tab.
Your playing some custom race you built and you need help in the editor? In this case on the "Race" has a "Natural Attack" button to add the weapons and select the damage.
You don't have the template and just want to add claws/bite to any race? Then I would recommend my
Adjustment addon.