Several years ago, client had a payroll tax audit and a deficiency was asserted. The client agreed with the deficiency calculation. In addition, the IRS agent did a rough interest calculation and gave it to us verbally over the phone. The interest was about $2,300. IRS agent said, "It's not exact, but should be good within a few hundred dollars or so." So, client cuts a check for $2,500 (plus the deficiency) to account for the fudge factor.
A lot of time passes and now the agent contacts my client (by way of a letter) indicating that the $2,300 was incorrect and the amount should have been $4,300, which has now grown to like $6,700. If you subtract off the $2,500 payment made, this results in a balance due of $4,200.
I'm wondering about an interest abatement for unreasonable IRS error/delay...Do we have a case?