You can delete the form if you started to enter one. Sign in to your account, click 'Take Me To My Return'. Click on My Account >>> Tools >>> Delete a Form. Look for the K-1, and delete it.
You can also type in ''k-1'' in the search box, then select ''Jump to k-1''. This will take you to the K-1 section in TurboTax. Answer 'YES' when it asks if you have a K-1. If you answer yes, the program will take you to the summary screen, where you can click the 'delete' button. See attached.