Would like to purchase 2015 basic tax return Turbo Tax software as filing status does not require a complicated return.
Amazon does offer the 2015 TurboTax Basic for $29.99. Prior year returns cannot be e-filed, they must be mailed.
https://www.amazon.com/TurboTax-Basic-Federal-Preparation-Software/dp/B01637R9IE/ref=sr_1_7?ie=UTF8&...
The Basic desktop edition is not available for prior year tax returns from the TurboTax website - https://turbotax.intuit.com/personal-taxes/past-years-products/
There may be a Basic edition for 2015 that you can purchase from an online retailer, such as Amazon.
Or you can use the free forms, schedules and instructions for a federal tax return from the IRS website - https://apps.irs.gov/app/picklist/list/priorFormPublication.html