Is your filing status married filing jointly? Go back to the Personal Info section and review the questions for the spouse that TurboTax says is deceased. See if you accidentally checked the box that says "Passed away before filing this return."
If that's not the problem, where exactly is TurboTax asking for information about a deceased spouse? What topic or section of TurboTax are you in? What is the title or heading on the screen? What is the exact wording of the question about the deceased spouse?