How do I get to enter business expenses in self employed return? When I jump to schedule C it doesn't even ask me if I had expenses.

If you are using TurboTax online, after you enter your income, continue through the application.  You should see a screen where you are given the option to Type in my expenses or Connect my accounts.  If you select, Type in my Expenses, TurboTax will automatically populate expense categories based on the information you entered about your business.  There will also be a section entitled Less common expenses which lists additional expenses.  These expense categories cover a broad array of business types, but you still may have expenses that may not "fit exactly" into the suggested expense categories.  Just continue through the application and you should see a button where you can Add expenses for this work as well as a button for additional income for your business. 

If you are using TurboTax CD/download, the process to enter your business expenses is different.  Select the Business tab, then Business Income and Expenses. Scroll down the screen to Business Expenses and select the option most relevant to your business.