See this TurboTax support FAQ on how to contact Support - https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-contact-turbotax/00/26991
Use this website to contact TurboTax support during business hours - https://support.turbotax.intuit.com/contact/
Use this phone number and select TurboTax - 1-800-4-INTUIT (1-800-446-8848)
On every TurboTax web page, including this one, scroll down to the bottom of the page and click on Contact Us
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 5 p.m. Pacific time Monday-Friday