The Epson ET-2840 doesn't require much maintenance. If you experience issues like printhead clogging—which can happen if you don't print anything for a long time—or misalignment, there are several maintenance functions that can help, including Nozzle Check, Printhead Cleaning, Power Cleaning, Printhead Alignment, and Paper Guide Cleaning. Due to this printer's high page yield, you won't have to refill the tank often. That said, make sure you don't completely empty the tank, as that would introduce air bubbles into the tubes, which can potentially damage the printer.

Refilling the tank is easy; you only need to start the Fill Ink function, fill the tank, and reset the ink level. The ink bottles have keyed nozzles that only fit into the corresponding tank, so it's nearly impossible to put the ink into the wrong tank. As for paper jams, you can only access the sheet rollers through the front.

You can see the user manual here.