You can only buy the last 3 years, so 2015-2017 here,
https://turbotax.intuit.com/personal-taxes/past-years-products/ You have to print and mail prior year returns. Send each year in a separate envelope.
Then for older returns you need to go somewhere local or get the blank forms from the IRS and state. I have links to some.
Like Here are some blank forms & instructions for 2014
1040
https://www.irs.gov/pub/irs-prior/f1040--2014.pdf Instructions
https://www.irs.gov/pub/irs-prior/i1040gi--2014.pdf 1040A
https://www.irs.gov/pub/irs-prior/f1040a--2014.pdf Instructions
https://www.irs.gov/pub/irs-prior/i1040a--2014.pdf 1040EZ
https://www.irs.gov/pub/irs-prior/f1040ez--2014.pdf Instructions
https://www.irs.gov/pub/irs-prior/i1040ez--2014.pdf 2014 Tax Tables
https://www.irs.gov/pub/irs-prior/i1040tt--2014.pdf Publication 17 Tax Guide for 2014
https://www.irs.gov/pub/irs-prior/p17--2014.pdf Don’t forget your state. And you will have to print and mail your returns. So be sure to attach copies of your W2s and any 1099s that have withholding on them. You have to mail federal and state in separate envelopes because they go to different places. Get a tracking number from the post office when you mail them for proof of filing.
