There is no license code for the TurboTax online editions.
If you purchased the TurboTax software either as a CD or Download, install the software on your personal computer and when the application is opened you will be asked for a license code.
See this TurboTax support FAQ for the license code - https://ttlc.intuit.com/community/tax-topics/help/i-can-t-find-my-license-code/01/852973
I purchased my Turbotax Home & Business from Costco and have a license code. When I go to install my download, enter the license code, I receive an error message to re-enter the code...
Assistance with your license code has been provided by clicking here.
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