While Congress debated the payroll tax cut extension, a tax provision allowing homeowners to deduct private mortgage insurance premiums from their annual federal tax bill quietly expired on Dec. 31. Consequently, mortgage loans with private MI that closed on or after Jan. 1, 2012, will no longer be able to use the deduction, unless Congress passes a bill that extends the deduction through next year retroactive to the beginning of 2012. It is a lapse that occurs almost every year, according to MI industry participants. Tax deductibility of MI premiums is part of a huge legislative package...