I pay rent for office space. Where can I deduct this from my self employment income? Thank you!

You can enter the office rental space under the Less Common Business Expenses >Building and land rental (See Screenshot).

To enter Business income and expense information in TurboTax, log into your tax return (for TurboTax Online sign-in, click Here and click on "Take me to my return") type "Schedule c" in the search bar then select "jump to Schedule c". TurboTax will guide you in entering this information.