It's one thing for them not to know what is owed. But surely they know what's already been paid? No amount of errors on a W-2 or 1099 or whatever will make me e

It's one thing for them not to know what is owed. But surely they know what's already been paid? No amount of errors on a W-2 or 1099 or whatever will make me eligible to receive a refund of taxes I never paid.