You should submit a tax declaration regardless. Either it’s required, or you’ll most likely receive a refund. So no, there is no harm; on the contrary.

Since the original poster likely won’t do this anyway, this discussion is pointless.

As a takeaway message: Just submit your tax declaration, even as a working student. In most cases, you’ll get some money back. And send it to your Finanzamt (tax office), not the IRS. The US won’t process your German tax declaration.

Cheers