Using the TurboTax online editions you will need to upgrade to the Premium edition which supports a Schedule K-1 entry, the Deluxe online edition does not.
To enter a Schedule K-1
Click on Federal
Click on Wages & Income
Scroll down to S-corps, Partnerships, and Trusts
On Schedule K-1, Q, click on the start or revisit button
Or enter k-1 in the Search box located in the upper right of the program screen. Click on Jump to k-1