Canon MAXIFY GX4020: Setup, Drivers, Ink and Common Problems

Is the Canon MAXIFY GX4020 right for you?

The GX4020 is the complete compact MAXIFY MegaTank: pigment ink, duplex, a 35-sheet ADF, fax and Ethernet in a footprint that fits a home-office shelf. It competes directly with the Epson ET-4850 and wins on print durability while trailing on ADF duplexing. Small businesses that scan contracts and fax occasionally will find it covers everything at minimal running cost.

Best for: Small offices wanting pigment MegaTank with ADF and fax in a compact body

Setting up the Canon MAXIFY GX4020

After filling and charging, connect Ethernet or use the LCD to join Wi-Fi, then run the fax wizard for your line type. Install the GX4000 series package from ij.start.canon so the ADF appears in IJ Scan Utility. Set the cassette paper size on screen to avoid mismatch errors from mobile prints.

1. Unbox and prepare. Remove every piece of shipping tape and packing material, install the ink bottles (fill each tank to the upper line), and load paper in the tray.
2. Join your Wi-Fi. Keep the printer close to the router for setup. Most printers only connect to the 2.4GHz band, so if your router broadcasts one merged network name you may need to split the bands temporarily. See our Wi-Fi guide if it will not join.
3. Install the setup app. Use Canon's official app rather than a driver you found on a search result — third-party driver sites are the most common source of printer malware.
4. Add the printer. On Windows 11: Settings › Bluetooth & devices › Printers & scanners › Add device. On macOS: System Settings › Printers & Scanners › Add Printer.
5. Print a test page and run a scan if this is an all-in-one, so you find any problem now rather than when you are in a hurry.

Ink, toner and supplies

The Canon MAXIFY GX4020 uses the following consumables. Match the number exactly when you buy: the same printer family often uses several different cartridge numbers by region.

• GI-26 Black / C / M / Y (GI-56 in UK/EU)
• MC-G02 maintenance cartridge

High-yield (XL) versions almost always cost less per page if you print regularly. On third-party ink and toner, read our honest assessment first, and note that some manufacturers push firmware that rejects non-original chips.

Full specifications