We have not had any issues in recent years, but several years ago, we did. They said we owed like $250,000 more in taxes. Could barely ever get anyone on the phone. When we did, they always identified themselves as “Mrs. Knox”, which was impossible that we were repeatedly reaching the same person.
At some point, they told us on the phone that it was resolved (and we actually got a modest refund after it was all settled), and we said we needed to have something in writing from the IRS, since we had all these threatening letters, etc.
But I suspect there is something to it, that being in Florida, they are slow-walking any refund due.