I'm sorry, but there is not. In order to open your .tax2015 file, you'll need to purchase and download the 2015 software to your computer. (If you've already paid for TurboTax 2015, you may be able to get a free download via TurboTax Customer Support).
Use the link below to purchase the 2015 TurboTax program if you need to:
https://turbotax.intuit.com/personal-taxes/past-years-products/2015/