You would have to get another code from Turbo Tax. But you might not need to install the 2020 program. You only need the data file ending in .tax2020 to transfer into 2021 next year. Did you have a backup of the .tax2020 file and any pdfs you made? The 2020 program won't help you if you don't have the data file to open.
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
