In TurboTax Online, click on "Search" in the top right side of the page, and then type in "capital gains." Click on "capital gains" in the drop down that appears, and then a blue link that says "Jump to capital gains" will appear directly below the search bar. Click on that. 

Thanks, Ericka.  I’m using the CD version of Deluxe on a Mac.  The Online search does not apply.

I was confused because Sched. D, Line 22 says that cap gain(loss) is reported on 1040, Line 13.  Turbo Tax's 2018 Form 1040, Line 13 has an unrelated computation.  Cap gains are dealt with in Schedule 1, Line 22 of which is passed to Line 6 of Form 1040.  I now understand how cap gains were included in AGI.

My apologies if I have confused others.