It depends what software/browser you are using:
Microsoft Office: It is a four step process: (1) Go to File > Print. (2) Click on "Print One Sided." (3) Click on "Printer Properties." (4) In the dialog box under "Double Sided Printing," choose "None," then Click "OK."
Google Chrome: It is a four step process: (1) Hold down Ctrl and P keys or right click and select print. (2) Under "options," uncheck "two-sided." (3) Click on “Print using system dialog.” (4) Click on “preferences.” (5) Under “Double-sided Printing” select none.
Firefox: It is a three step process: (1) Hold down Ctrl and P keys or right click and select print. (2) Click on “preferences.” (3) Under “Double-sided Printing,” select none.
Microsoft Edge: This is currently not an option.