To access your prior year returns, first go to your Overview page (
https://myturbotax.intuit.com/home/). On the navigation bar along the top of that page, there will be a tab labeled 'My TurboTax.' Click this, and scroll down a short distance on the page. There should be a banner on the bottom labeled "Looking for prior year returns?" in green. That should give you access to all returns you have filed in prior years.