We finished paying off our mortgage in 2018. Now it won't let us proceed without putting our "mortgage info" What should I do?

[Critter]

If the shell form transferred in from last year then delete the unwanted form ...

1. Open your return in TurboTax. (To do this, sign in to TurboTax, and select Take me to my return.)
2. In the left-side menu, select Tax Tools > Tools.
3. In the pop-up window Tool Center, choose Delete a form.
4. Select Delete next to the form/schedule/worksheet in the list and follow the onscreen instructions.