To purchase the Download version of TurboTax, you will visit the following TurboTax link: https://turbotax.intuit.com/personal-taxes/cd-download/, and choose the version of TurboTax that you wish to purchase and click on the Buy Now button for that version. Once you have completed your purchase you can follow the instructions listed in the TurboTax FAQ below to download your purchased download:

https://ttlc.intuit.com/replies/3302070