Live customer support is available to paying customers. Live help from a CPA is included if you pay for TurboTax Live.
https://ttlc.intuit.com/community/choosing-a-product/help/what-is-turbotax-live/00/27191
Phone support is not provided with the Free Edition. If you are using a paid version of the software or if you purchased PLUS you can get phone support when customer support is there. Otherwise, post your question here and someone will try to help.
To call TurboTax customer support
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
They are available from 5 a.m. to 9 p.m. Pacific time
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
https://twitter.com/TeamTurboTax
or
https://www.facebook.com/turbotax