The 2-year Comparison shows a capital gain for 2018. I cannot find it in the income list on the 1040 as it has always been in past years.
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.