You don't need to include a Schedule D in your income tax return if it's not needed, but that doesn't mean that no activity is occurring with that carried forward loss, activity that TurboTax should be tracking. My specific question you you was "have you been receiving the $3,000 loss each year?" Look at your income tax return and answer that question. If the answer is "Yes" then TurboTax is working "as designed" if you've been faithfully transferring prior year tax information into current year taxes.
TurboTax also prepares a "Federal Carryover Worksheet", (typically not printed out with an income tax return "for filing"), that should also show that loss carryover amount. You should be able to look at that worksheet too. (I use "desktop" TurboTax where all Forms/Schedules/Worksheets are always available to me. I assume the "online" versions - if you use that - also have that capability.)
