This is a user to user forum. You can probably get help from this forum by clarifying your question.
To contact TurboTax (TT) support:
https://turbotax.intuit.com/support/contact/index.jsp
In the search line enter some keywords or question without quotes. On the next page, skip the suggested topic links and scroll down until you see CALL US. It should show the wait times. Week days 5 AM - 5 PM Pacific time. Free support is not available to Free Edition users. You will have to upgrade to talk to a representative.
That said, what you briefly describe sounds like you may need to go to a tax pro for help straightening it out. For example there are no longer any exemptions (starting in 2018). TT automatically calculates your standard deduction. The return cannot be e-filed without something on line 12 of form 1040 (2020). Dependents do not, usually, get the full $12,400 deduction.
