Sorry but you have never been able to share the CD. The license is that you can install it on 5 computers you own. They are now enforcing it more by tying it to an online account.
See this FAQ for why do I need to sign in to an Intuit Account this year?
https://ttlc.intuit.com/turbotax-support/en-us/help-article/license-information/install-turbotax-cd-...
