I find mine under 'my account'
then it lists google then adsense then amazon and ebay (which I dont have)
so I put my mouse under the adsense and it opens a page like my google one and it tells me what I have earned for each month for adsenses..
.once I signed up for adsense (which I am sorry I did not do until this summer)eventually the adsense earnings showed every time I click on the words 'my account'
hope this helps