Why do you think you need to file a tax return from 14 years ago? The IRS is not looking for you to file a return from that tax year unless you have received an IRS notice in the mail.
The only forms you will find will be on the IRS website for federal taxes - https://apps.irs.gov/app/picklist/list/priorFormPublication.html
Form 1040 (2006) - https://www.irs.gov/pub/irs-prior/f1040--2006.pdf
Form 1040 (2006) instructions - https://www.irs.gov/pub/irs-prior/i1040--2006.pdf
