Sometimes my paper just gets stuck in the paper tray. What I can recommend is to change your paper and try different jam-free papers. Some type of papers tend to cause paper jam more than the others.
"I got my order in fine shape, and, unlike others I've tried, the cartriges fit without mashing then in place. The cleaning cartridge does a nice job, printer works like it did when new. I will order your products again. Thanks!" (Richard P.)