How to open printer to change cartridge? - Dell A920 InkJet Printer

Per the user manual:

1 Make sure the printer is on.
2 Lift the printer (scanner unit) until the scanner support keeps it open. The ink cartridge carrier moves and stops at the loading position unless the printer is busy.
3 Squeeze the tabs on the cartridge lids, and then lift the lids.
4 Remove the old cartridges. Store them in an air-tight container or dispose of them.
5 If you are installing new cartridges, remove the stickers and tape from the bottom of the cartridges.

Also this may come in handy if you need to purchase replacement ink cartridges:

Item: Part number:
Black ink cartridge T0529
Color ink cartridge T0530

In order to replace the cartriage, please follow the steps below:
1 Keep the printer on.
2 Lift the printer (scanner unit) until the scanner support keeps it open.
The ink cartridge carrier moves and stops at the loading position unless the printer is
busy.
3 Squeeze the tabs on the cartridge lids, and then lift the lids.
4 Remove the old cartridges.
5 If you are installing new cartridges, remove the stickers and tape from the bottom of
the cartridges.
6 Insert the new cartridges. Make sure the color ink cartridge is secure in the left carrier
and the black cartridge is secure in the right carrier, and then snap the lids closed.
7 Lift the printer (scanner unit) and push the scanner support back while lowering the
printer (scanner unit) until it is closed.