Your K-1 from your SCorp should have amounts listed in box 17 with one or more codes from this range: V, W, X, Y, or Z.  The amounts in box 17 with these codes are the amounts that will be used for the calculation of the Qualified Business Income Deduction (QBID).  Therefore, once you enter your K-1 and the box values for 17, TurboTax will be aware that the QBID calculation needs to be determined.  This amount will be reported on line 9 of your 1040 form.  Note, if there not any amounts in Box 17 with at least one of those codes, then you need to go back to the preparer of the K-1 and find out why.

Here is more information on the QBI deduction, plus examples of how the deduction is calculated:

https://ttlc.intuit.com/replies/7019998