Fewer people currently are subject to transfer taxes than ever before. But gift, estate and generation-skipping transfer (GST) taxes continue to place a burden on families with significant amounts of wealth tied up in illiquid closely held businesses, including farms.  Fortunately, Internal Revenue Code §6166 provides some estate tax relief, allowing the estates of family business owners to defer estate taxes and pay them in installments if certain requirements are met. §6166 benefits For families with substantial closely held business interests, an election to defer estate taxes under §6166 can help them avoid having to sell business assets to pay estate taxes. It allows an estate to pay interest only (at modest rates) for four years and then to stretch out estate tax payments over 10 years in...