https://ttlc.intuit.com/questions/1901340-where-do-i-enter-schedule-c

Where to enter expenses

https://ttlc.intuit.com/community/entering-importing/help/where-do-i-enter-my-self-employment-busine... 

If you don't find a spot that fits you can enter them in Other Misc Expenses.

To enter your self-employment expenses, please follow these steps:

In TurboTax Self-Employed online version, 

1.  Sign into your account and select Take me to my return

2.  At the right upper corner, in the search box, type in schedule C and Enter 

3.  Select Jump to schedule C 

4.  On screen, Did you have any self employment income or expenses?  Answer Yes, continue through step-by-step interview questions about your business

5.  On screen, Your Business, scroll down to Business Expenses, select your categories and Start