I clicked on "Forms" (towards the right on the blue bar on top of TT Home & Business) to open my Return in "Foms" mode. Scrolled down to "K-1 S-Corp" and found that there was an "Error!" mark. I had my amount entered, but still it said the amount is missing. I was puzzled to see that.
Then, I scrolled down to D-1 section and updated the same S-Corp income on the first line. The error went away and the QBI deduction was calculated and applied correctly.
Based on my personal experience this is what the bug is:
If you miss entering K-1'Box-17 V-Code info first (so, QBI deduction is not calculated), and later realize it and enter it using the GUI user entry, it seems to take it. But, doesn't update the "D-1" section. So, QBI is not applied. But, later when you update it using the "Forms" mode, it takes it and then calculates the QBI deduction. This bug must be fixed to make Users not keep wondering what is wrong.
