Where do I enter my self-employment business expenses, like home office, vehicle mileage, and supplies?

To enter your home office, vehicle mileage, supplies and other common business expenses:

1. Type “Schedule C” in the Search box.
2. Select the “Jump to” link.
   • If this is your first time working in this section: You’ll be asked some questions about your self-employment work, and then have a chance to enter your expenses.
   • If  you have already entered some information about your self-employment work:
     • Select Edit next to your business, and confirm your general business info if asked.
     • Select Add expenses for this work OR, if this your first time entering expenses, select Continue on the Let's get the deductions...screen.
     • Follow the screens to enter your expenses.

TurboTax CD/Download Home & Business - Follow these instructions to enter your expenses.

You are posting your question from online Live Deluxe.  If you have business expenses to enter on a Schedule C you will need to upgrade to Premium software.  If you are really using the "LIve" software---your expert would tell you that.

You are posting from TurboTax Live.  You can arrange for the Live help you are paying the extra fee for with your questions from 5 a.m. to 9 p.m. Pacific time.

https://ttlc.intuit.com/questions/4124827-how-do-i-connect-with-a-tax-expert-in-turbotax-live