I have Googled this all morning. I am supposed to have a line that says Switch Tab after I hit the 3 dots in the upper right hand corner.
Spoiler alert: I don't.
When I close the tabs I still have the black screen and it still says that I am in Incognito Mode .
Hit the number that is surrounded by a box next to your address bar for your browser at the top. That's your page picker and from there you can close pages, open pages in normal or incognito mode and also shows you how many pages you have open in both modes and a swtich to turn the private browser off
Or, from your home screen, pull down your quick settings menu, and in your notifications bar you'll see chrome incognito browser open, push the small arrow btm right, expands the notifications and then select close all. Proof! Privacy browsing is off!