You are posting from Self-Employed. Are you perhaps confusing itemized deductions like mortgage interest and property tax with your Schedule C business expenses like mileage and supplies, etc.? TurboTax defaults to your standard deduction unless you enter enough itemized deductions on a Schedule A to exceed your standard deduction. Forcing itemized deductions is unlikely to help you. You can try --and see the results --- since you say you have not filed yet.
HOW TO FORCE ITEMIZED DEDUCTIONS
https://ttlc.intuit.com/questions/1900142-how-do-i-change-from-the-standard-deduction-to-itemized-or...
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