Yes you needed to keep the License Code in a safe place.
Turbo Tax asks for the License Code each time you start
https://ttlc.intuit.com/community/tax-topics/help/turbotax-2019-requests-license-activation-at-every...
If you lost the Code Contact Customer Service 5am-5pm Pacific M-F
https://support.turbotax.intuit.com/contact/
