No. "Live" is not available on Sunday now that the filing deadline has passed.
You are posting from TurboTax Live. You can arrange for the Live help you are paying the extra fee for with your questions from 5 a.m. to 5 p.m. Pacific time Monday - Friday.
https://ttlc.intuit.com/questions/4124827-how-do-i-connect-with-a-tax-expert-in-turbotax-live