I had a similar problem of TurboTax complaining about the K-1 entries (which were blank in my case)... I was also unable to see the K-1 form in the full list of forms. To see that list of forms, go to the top blue bar of TurboTax app and click on the "Forms" icon in the right margin of that bar, that will bring up the list of all the Forms applicable that have been filled out by TurboTax through the interactive interface so far.
To get the K-1 to show up, I had to "fix" the error by going from the Smart Check process, providing a Partnership Name entry (made one up) since that was one of the errors highlighted. Then I saved my return, and then went back to "Forms" list, and there it finally listed the K-1 Form with my made up Partnership name. I could then highlight and delete this errant form (there's a Delete Form button at the bottom of the Forms listing). This finally cleared up my K-1 "error" during the Smart Check step. Hope this helps...
