You purchased the TurboTax desktop edition to be installed on your personal computer. You did not purchase one of the TurboTax online web-based editions which do not require a license code.
See this TurboTax support FAQ for installing the desktop editions software with the license code - https://ttlc.intuit.com/turbotax-support/en-us/help-article/license-information/install-turbotax-cd-...
