I didn't file last year <how do I make sure I get my return from last year along with my 2016 taxes

You must file a separate 2015 tax return that includes all your 2015 information. You can't include 2015 information on your 2016 tax return. You can't use the online product to file a 2015 tax return. You must buy and download the 2015 program: https://turbotax.intuit.com/personal-taxes/past-years-products/