Connecting your Canon TS9120 to Wi-Fi is not difficult. You simply need to follow a few essential steps. Here they are:
Step 1: Ensure your Canon TS9120 is powered on.
Step 2: On your printer’s home screen, tap on the Wireless LAN icon.
Step 3: On the Basic network information screen, select LAN settings.
Step 4: In the LAN settings page, choose the Wireless LAN option.
Step 5: On the Wireless LAN screen, select "Wireless LAN Setup."
Step 6: In the Wireless LAN setup settings, select “Easy wireless connect.
Step 7: Tap "Yes" to apply the settings on your device.
Step 8: The screen will prompt you to follow the instructions on your device.
Step 9: Download the Canon PRINT Inkjet/SELPHY app on your device.
Step 10: Open your Wi-Fi settings and tap on the Canon TS9120 series.
Step 11: Once connected, open your Canon PRINT Inkjet/SELPHY app.
Step 12: Tap the "Add Printer" icon in the top-left corner.
Step 13: Tap "Register Printer" at the bottom of the screen.
Step 14: Tap on OK to complete the wireless LAN setup.
Step 15: On the wireless LAN setup page, select “Auto Select Conn.Method.
Step 16: Select your wireless router.
Step 17: Enter your wireless router password and tap on OK.
Step 18: Once you see a pop-up displaying “Sent the settings,” tap on OK.
Step 19: Wait for the app to search for printers.
Step 20: Once your printer appears in the list of available printers, tap on it.
Step 21: Change your printer name or tap on OK.
Once connected, you can print, copy, or scan from anywhere using any device (laptop, desktop, or smartphone). Additionally, you can access Canon PRINT apps or cloud services like Google Drive.
Source:- Connect Canon TS9120 to WiFi