You can only buy Turbo Tax for 2015 or newer. They only sell the last 3 years.
If you have a simple return, you can fill out the blank forms by hand for free.
Here are some blank forms & instructions for 2014
1040 <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-prior/f1040--2014.pdf">https://www.irs.gov/pub/irs-prior/f1040--2014.pdf...Instructions <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-prior/i1040gi--2014.pdf">https://www.irs.gov/pub/irs-prior/i1040gi--2014...>
1040A <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-prior/f1040a--2014.pdf">https://www.irs.gov/pub/irs-prior/f1040a--2014.p...Instructions <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-prior/i1040a--2014.pdf">https://www.irs.gov/pub/irs-prior/i1040a--2014.p...>
1040EZ <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-prior/f1040ez--2014.pdf">https://www.irs.gov/pub/irs-prior/f1040ez--2014...Instructions <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-prior/i1040ez--2014.pdf">https://www.irs.gov/pub/irs-prior/i1040ez--2014...>
2014 Tax Tables <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-prior/i1040tt--2014.pdf">https://www.irs.gov/pub/irs-prior/i1040tt--2014...>
Publication 17 Tax Guide for 2014 <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-prior/p17--2014.pdf">https://www.irs.gov/pub/irs-prior/p17--2014.pdf</a>
Prior year returns can only be printed and mailed. Mail each year in a separate envelope. When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS received the return. And don't forget state.