If you are trying to enter expenses from self-employment you are entering them in the wrong place, TurboTax Premier doesn't have those forms.
If you are trying to enter expenses for your W-2 income, they no longer deductible (and that's the section you are in, I am pretty sure, and why you are seeing zeros.)
These aren't product defects, they are entry errors.
I can see from your post that you have the "Live" version of TurboTax - take advantage of it and click where it says Live Help. That will help you connect to an agent who can see your screen and walk you through the steps to get things in the right place to accomplish what you're after and end your frustration. No need to stay frustrated when you have that lifeline right there available to use!