We are not a general or limited partnership so why am I being asked to complete a Schedule K-1?

Are you doing a 1040 return?

Yes

Perhaps a Schedule K-1 was started inadvertently. To remove the K-1, you need to remove the "triggers" in the interview by following these steps:

1. Click on Federal Taxes > Wages & Income [In TT Self-Employed:  Personal > Personal Income > I'll choose what I work on].
2. Under Other Business Situations, click on the box next to Schedules K-1, Q.   ,  
3. Click Yes on the next screen, Schedules K-1 or Q.
4. On the Tell Us About Your Schedules K-1 screen, click on the Update box next to any of the entities (Partnership, S-Corp., Estate/Trust).  [If there is a Start box, it means that no data has been entered, so you can ignore that category.    
5. If you see the screen, [Entity Type] K-1 Summary, click Delete next to the K-1 entry to remove it.     Click the Yes box to confirm.  Then click Done.
6. If you see a screen asking information about the entity, click the Back button.  No K-1 has been triggered for that entity.
7. You'll be taken back to the Tell Us About Your Schedules K-1 screen.
8. Follow the same process for the other categories of K-1s.

Once you've removed the triggers, the K-1 form will no longer be part of your return.