If it jammed because you put too many papers in at once turn it off and turn it upside down and try to pull the papers out from the bottom.
I have cleared a jam of papers by putting it in reverse and then quickly back forward a few times. Depending, you can try to put another thicker paper in to force whatever is stuck out. Make sure the basket is not full of shredded paper up to the cutters sometimes that causes things to jam.
I hope this help. Biggest precaution is not to put too many papers in at once.