You can enter Self-Employment expenses in the Self-Employment section. In TurboTax Online, Self-Employment Expenses will be available tomorrow, February 15th. 

I just check and it's still not ready yet.

As of February 15th midday Self-Employment expenses will be updated and available, please try later this afternoon. 

Thank you for your patience and for choosing TurboTax. 

the self-employment section asks me whether I have business expenses, I say yes and  then the button below says 'done with businesses' or 'enter a new business'. it doesn't tell me where to enter expenses!

@rf1960 Please clear your browser cache (or use a different browser) and try again. If you are still not able to resolve this issue, please contact our phone support team at 1-888-829-8608 for more help.