(…and possibly their valuation consultant?) Rev. Proc. 2014-18 provides a simplified method for certain taxpayers to obtain an extension to elect portability under Code Sec. 2010(c)(5)(A). This method allows a widow or widower to apply a deceased spouses unused exclusion (DSUE) amount to the surviving spouse’s subsequent transfers during life or at death. In these situations, the ability to file and use the DSUE amount is a must.