Several of us have that exact same problem. It doesn't let you. It says the License has already been used on another account. So far the only resolution is to call in and get another License Code.
Contact Customer Service
5am-5pm Pacific Time Monday -Friday
https://support.turbotax.intuit.com/contact/
What is the Turbo Tax phone number
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632