Contact support to see if the expert you want is available this year. The "Live" experts are seasonal employees who may or may not be working with TT this year.
To call TurboTax customer support
https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-management/contact-turbotax/L2y9ZKpQB_US_en_US?uid=m5s9l2vh