There is no specific function in QB to take screen shot , you can take screen as usual do in Windows OS
Like for Windows 7, 8, 10 You can find PrtSC may be in top buttons or align to Num buttons right side the screen will capture and come into your clipboard you can paste it anywhere like Paint or rich media editor like Email programs As well , If Print screen option not enabled you have to Press Alt + PrtScn alternatively you can try with Press the Windows key + Shift + S Or Press the Windows key + PrtScn
You can also try Windows Snipping Tool
For MAC PC And Laptop
Press these three button together on MAC Laptop or PC Shift, Command, and 3 take screen shot if you want to take portion screen shot try Shift, Command, and 4 and then see the Grab button and select the screen portion and download or paste anywhere .
Still having issue connect now QuickBooks Support Phone Number to get assistance .