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The Form 1120S Schedule K-1 codes changed in 2019.

Enter the code V when you enter the K-1 box 17 screen, but you don't need to enter an amount.  Continue on, and you'll find the screen(s) you need to enter the Section 199A Statement/STMT information.   Later in the questions is a screen titled "We need some more information about your 199A income or loss".  This screen must be completed with the box 17 code V Section 199A Statement or STMT that came with your K-1, in order for your QBI deduction to be calculated.

 And, depending on what is reported on your Section 199A Statement/STMT, you may need entries on the next "Let's check for some uncommon adjustments" screen as well.

To get back to the K-1 summary screen and find the Schedule K-1 to edit, click the "magnifying glass Search" icon on the top row, enter "k-1" in the search window and press return or enter, and then click on the "Jump to k-1" link to find the K-1 you need to edit.

Here are screenshots of the two screens to enter your Section 199A Statement/STMT information: