Log into your AdSense account. You should be seeing activity in your Overview page. Even if no earnings shows up yet, you should see page views greater than zero.
While logged in, Click on Account Settings. review all your information to be sure you entered all the required data.
Confirm your Payment method displays correctly.
Make sure your Tax information displays as "Submitted"
Confirm that you copied your AdSense Publisher ID to your HubPages Earnings page.