For product help, billing issues, or technical help:
Support hours are 5AM-9PM Pacific (8AM-12 Midnight Eastern), 7 days/week
FAQ: What is the TurboTax phone number?
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
For CPA/EA tax expert help as part of your Live upgrade:
Support hours are 5AM-9PM Pacific (8AM-12 Midnight Eastern), 7 days/week
FAQ: What is TurboTax Live?
https://ttlc.intuit.com/community/choosing-a-product/help/what-is-turbotax-live/01/27191
FAQ: How to connect with a live tax expert
https://ttlc.intuit.com/community/expert-review/help/how-do-i-connect-with-a-tax-expert-in-turbotax-...
FAQ: How do I schedule my review using TurboTax Live?
https://ttlc.intuit.com/community/expert-review/help/how-do-i-schedule-my-review-using-turbotax-live...