Can I use TurboTax to file a 2015 return?
Yes, you can prepare and file your 2015 tax return in the TurboTax software. Simply order the TurboTax software and install it on your computer. TurboTax Online for tax year 2015 is no longer available.
If you're expecting a refund, you have until April 15, 2019 to paper-file your 2015 return and claim your tax refund. After that, all unclaimed 2015 tax refunds end up in the U.S. Treasury.