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 (Monday-Friday 5 a.m. to 5 pm Pacific time). Otherwise, post your question here and someone will try to help.
To call TurboTax customer support
https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-management/contact-turbotax/L2y9ZKpQB_US_en_US?uid=m5s9l2vh