Canon MX420 - Manual (Page 19)

Step Two
2-B
3. Select Canon IJ Network in the pop-up menu, select Canon
MXxxx series in the list of printers, then click Add . *xxx refers
to the model number. MX410 series shown in example, below
Step Two
2-B
2. Click More Printers in the Printer Browser window.
19
Registering the Printer & Scanner