2018 Online 1040 income tax calculator.

[BTDretire]

I just put my info into this calculator.
https://www.mortgagecalculator.org/calcs/1040-calculator.php
 I'm self employed and don't see an adjustment for the QBI.
Do you see what section would be proper to put that 20% into?

[dandarc]

You could just enter it on another line under AGI. As I understand it, for most with income below where other limits start coming in to play, it will be 20% of the lower of QBI or taxable income (before the QBI deduction).

So, you could put everything else in, find taxable income, multiply by 20% and enter that into alimony paid or some other line that is 0 in the AGI section.

Or MDM has added it to the case study spreadsheet, so you could download that and use it there.