I have a small plan that uses an end of year valuation (typically 12/31), but is terminating the plan at the end of March (3/31). They use segment rates with a 3 month lookback from the valuation date to value the funding target. They expect to pay out the full assets by the end of August (8/31) within the same year.
Based on this, what would I use as the final valuation date to determine the minimum and file on the Schedule SB, 3/31/2012, 8/31/2012 or 12/31/2012? If not 12/31, how do I do the lookback to determine the segment rates?