Please use the following link, https://turbotax.community.intuit.ca/questions/1364511-where-can-i-download-the-cd-download-edition-....

Please use this link to download TurboTax 2018, https://turbotax.intuit.ca/personal-tax-software/download-tax-software.jsp.

how do I download the proper link foe 2018 prepaid with a key code version?

You can download TurboTax CD/Download for 2018, 2019 and other years from this page: https://turbotax.community.intuit.ca/community/product-information/help/where-can-i-download-the-cd-...