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Have a look at the rollers.

Have seen this one before, where there is a bit of paper from a previous paper jam still stuck inside on one side of the final feed rollers, This lets the paper still pass through, but crinkles a corner on the way past.

Good Luck

I second that you have something in the printer that is catching that corner.

I have found everything from pens to pennies in printers.

Lee

I'll third the other two responses.

It probably is a small torn piece of paper and may be difficult to see. Many times partial disassembly of the roller assembly is needed to retrieve such a small piece.

Dalton