Where can I find a manual that shows me how to change a cartridge of the Epson Stylus C42SX printer? PrintCountry.com has a refill help section where you can view the instruction on hw to refill your empty cartridge. You can find the section here. http://www.PrintCountry.com/faq-troubleshooting-refill-kits.asp. We also have listing for specific instruction depending on the brand and model.