The following hints can help you avoid jams:
Make sure the paper lies flat in the tray.
Do not remove a tray while the printer is printing.
Do not load a tray while the printer is printing. Load it prior to printing, or wait for a prompt to load it.
Do not load too much paper. Make sure the stack height does not exceed the indicated maximum height.
Make sure the guides in the tray or the multipurpose feeder are properly positioned and are not pressing too tightly against the paper or envelopes.
Push the tray in firmly after loading paper.
Use only recommended paper or specialty media.
Do not load wrinkled, creased, damp, bent, or curled paper.
Flex, fan, and straighten paper before loading it.
Do not use paper that has been cut or trimmed by hand.
Do not mix paper sizes, weights, or types in the same stack.
Make sure all sizes and types are set correctly in the printer control panel menus.
Store paper per the manufacturer's recommendations.