If you paid for TurboTax this year, you can download a previous year's return.. If you didn't pay to file this year, you'll need to upgrade to PLUS at a minimum before you can download old tax returns. Make sure you're using the same account that you used to file your 2015 taxes. Unfortunately two separate accounts cannot be merged.
Once you've paid or upgraded, sign in to your TurboTax account.
Click the Taxes tab in the top-left corner.
Then, scroll to the bottom and click the Load My Tax Timeline link in the bottom-right. Every year that you have used TurboTax online will appear.
Click on the year you are looking for and click the Download/print return (PDF) link. Your tax return will start downloading automatically.