The license code is not used on the TurboTax online editions.
You purchased software to install on your personal computer. Use the license code to download the software at this TurboTax website - https://turbotax.intuit.com/personal-taxes/cd-download/install-turbotax/
See this TurboTax support FAQ for entering the license code when installing the desktop software - https://ttlc.intuit.com/turbotax-support/en-us/help-article/license-information/install-turbotax-cd-...
