If you are on a regular keyboard, your "Print Screen" should be at the top of the keyboard, usually next to the F12 key. Or in that general vicinity.

I can't remember where it is on a laptop though.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi