We (TPA) have taken over a DB plan for 2013. It turns out that the 2012 contribution was funded late, and the 2012 Schedule SB reflects a funding deficiency. However, the sponsor never paid the excise tax.
They are now asking whether there is any particular advantage to coming forward and paying the tax at this time, vs. waiting until the IRS asks about it. Can anyone think of anything? Keep in mind that the funding deficiency goes away in 2013.
Dog