While TurboTax normally transfers carryovers from last year to your current return, it's possible this function wasn't successful for you this year.
If you believe you had a regular tax loss carry over from last year, you'll need forms from your prior year return.
Passive Loss Carryovers for Rental Activities are not reported on Schedule E. You will find the carryover for prior years on Form 8582, Part VII, column c. If you have always made a profit, this number may be zero.
To access your prior year return, see How do I view, download, or print a prior-year tax return?