Turbo Tax only sells and supports the last 3 years. For earlier years you have to go somewhere else or get the blank forms from the IRS.
2014
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.
2013
Here are some blank forms & instructions for 2013
1040 http://www.irs.gov/pub/irs-prior/f1040--2013.pdf
Instructions http://www.irs.gov/pub/irs-prior/i1040--2013.pdf
1040A http://www.irs.gov/pub/irs-prior/f1040a--2013.pdf
Instructions http://www.irs.gov/pub/irs-prior/i1040a--2013.pdf
1040EZ
Instructions http://www.irs.gov/pub/irs-prior/i1040ez--2013.pdf
2013 Tax Tables http://www.irs.gov/pub/irs-prior/i1040tt--2013.pdf
Publication 17 Tax Guide for 2013 http://www.irs.gov/pub/irs-prior/p17--2013.pdf
2013 Form 2210 http://www.irs.gov/pub/irs-prior/f2210--2013.pdf Instructions http://www.irs.gov/pub/irs-prior/i2210--2013.pdf
