Try deleting it this way. Go to the K-1 interview section here
Personal
Personal Income
Choose I'll choose what I work on
Then scroll way down to Business Investment and Estate/Trust Income
Schedule K-1 - Click the Start or Update button
If the first screen says "Do you want to review Schedule K-1?". You have to answer yes and then click Update by the Schedule K-1 type (LLC, S corp, trust). The next screen is the Summary screen listing all of the K-1 entered for that type of entity. You can review, edit or delete it there.
