Deductions & credits
You can leave the box 17 amount blank, just enter your code V. Continue on, and when you get to the "We need some more information about your 199A income or loss" screen, make the selection for [Name of business] has other income (loss). Enter your -257 in the first of the two boxes that appear, and if it was reported by the business on Form 4797 make the same entry in the second box. Your QBI deduction will then calculate correctly.
Here is a screenshot of the screen you look for:
[Edited 03/24/2020|7:51am PST]
