How do I report my S corp buisness through the K - 1 (Form 1120-S) on my personal return?

You enter the Schedule K-1 received from the S Corporation.

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

Or -

To enter a Schedule K-1

Click on Federal Taxes (Personal using Home and Business)
Click on Wages and Income (Personal Income using Home and Business)
Click on I'll choose what I work on (if shown)
Scroll down to Business Items (Business Investment and Estate/Trust Income using Home and Business)
On Schedule K-1, Q, click on the start or update button