Here are some links depending on where you bought it.
If you Downloaded from a retailer and can't find the License Code
If you have the Turbo Tax CD and can't find the License Code
Find the License Code if you downloaded from Turbo Tax or the Advantage plan
I have Turbotax installed and in use but when I try to open it, I am asked for my license code. I know that it is with the box that the CD came in, but I cannot find it. How can I open and access my 2019 return in progress?
I think you can ask for another License Code.
Contact Customer Service
(You need to pick the CD/Download program in the product drop down box.)
5am-5pm Pacific Time Monday -Friday
What is the Turbo Tax phone number