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
They are available from 5 a.m. to 9 p.m. Pacific time
@roberts9107 The support hours you saw posted in this thread were in a reply given in February--during prime tax season. Support hours change at various times of the year.
It would be nice if they could finish up the callers on hold before going home for the evening. Instead, I got hung up on then received an email telling me my case was closed. I tried calling earlier in the day but was on hold much longer than the 5 to 10 minute estimated hold and had to hang up to make an appointment. They could state the hours of service in obvious ways so that users know when is best to call. I only found out after trying to call again after 8 PM EST.
@roberts9107 Has your question been answered or do you still need help? We can help with most questions here in the user forum---except for billing issues.