TurboTax support is open from 5am to 5pm Pacific time (8am to 8pm Eastern time), Monday thru Friday
Use this website to contact TurboTax support during business hours - https://support.turbotax.intuit.com/contact/
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
And FYI ... the initial beta version of the program is NOT fully functional .... it will need several updates over the next 2 months to install all the tax law changes and work out the bugs ... do not expect the calculations to be correct yet or all the forms to be updated (heck even the IRS still has the 2019 forms in draft mode).
If you need to do any 2019 tax planning you need to use the 2018 fully operational program using the What If tool in the FORMS mode.