Just go to the Blogger Dashboard and select monetize.

This gives the user options for configuring ads. If the users blog is already connected to FeedBurner, you can confirm that the proper feed is being configured. AdSense for Feeds will pick the ad size automatically.Users can view AdSense reports after setup to view feed revenue right from the Blogger Dashboard. You can of course see the reports in your AdSense account as well. Google launched AdSense for Feedburner last year. This came just after Google closed down the Feedburner Ad Network.