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I'll be glad to help you 
As I understand you are unable to change the printer WiFi settings,
No worries, as I'll be glad to help you, that said, I'll need a few more details to dissect your concern & provide an accurate solution:
Are you attempting to change the WiFi settings on the printer or on the computer?
While you respond to that, perhaps, you could also include a screenshot for a better understanding?
While you respond to that, I recommend you reset the WiFi settings:
Step 1: Prepare for the connection
Before setting up the printer on your wireless network, gather the network name and password, and turn on your router, printer, and computer.
Gather the following items:
Network name: The network name is the SSID (Service Set Identifier).
Network password: The password might also be called the WEP key or WPA security passphrase.
A computer connected to your wireless network
Internet access: HP recommends broadband Internet access such as cable or DSL for software downloads, using Web Services, and getting printer updates.
Make sure the router and computer are turned on, and that the computer is connected to the same wireless network to which you want to connect the printer. Turn on the printer and place it close to the computer and within range of the router during the setup procedure.
Disconnect any USB or Ethernet cables from the printer.
Step 2: Connect the printer to the wireless network
The Wireless Setup Wizard provides an easy way to set up and manage the wireless connection to your printer.
On the printer control panel, touch the Wireless icon
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, and then touch the Wireless Menu icon
, and then touch the Wireless Menu iconCLICK HERE FOR MORE STEPS AND INSTRUCTIONS.
(by the end of this document, all the issues should be resolved)
Let me know how that pans out
I hope you have a good day ahead,
And Feel free to ask any other queries as well,
Considering, this forum has some of the best people in the world available and ready to help.
{If this resolved your concern, Click on "Accept as Solution" & the Purple Thumbs up}.