Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
What make and model of printer is it, please?
Are you trying to connect it to the Google Cloud, to use as a Cloud printer? or for some other purpose?
Do you want it to connect to the internet through your computer?
What happens when you try to connect it?
How are you trying to connect it?
And is it connected by a USB cable to your PC?
Is your computer connected to, and using, the wireless then?
If so, then the wireless works and you know what its WiFi passphrase or password *****
But, when you enter that passphrase on the printer, to connect the printer to the router or modem, are you observing the difference between UPPER-CASE and lower-case letters in the password? you have to, even on a printer, in order to get it connected properly to WiFi networking.
Try it again - if the 'keyboard' on the printer looks all-UPPER-CASE, or all-lower-case, then there's a Shift key on that 'keyboard' that you may have to use to switch to the other case, as needed for each character.
Does your passcode have UPPER CASE letters in it?
And nothing else? no - characters, for instance?