The State of Virginia recently came after me for back state taxes- with fees added in, $3600 that it is impossible I could owe them, as I've never owed Virginia any state taxes, ever. (A military and residency tax thing.) I dealt with it appropriately- phone calls, the faxing of certain documents, tact.
But this is what I should have done.
101 thanks to custard-kisses, where I found this gem.