See this TurboTax support FAQ for how to enter the license code when installing the desktop software download on your computer - https://ttlc.intuit.com/turbotax-support/en-us/help-article/license-information/install-turbotax-cd-download-software-license-code/L1wFOSXur_US_en_US?uid=m6y0ep4a
Get out of the TurboTax online editions and go back to your computer to finish installation of the desktop software.