Three important mortgage-related tax provisions worth an estimated $600 billion over five years survived Washington policymakers’ chopping block in the final agreement that averted the “fiscal cliff” of massive automatic tax hikes and spending cuts. However, a new fight between Republicans and Democrats is around the corner over increasing the nation’s debt limit again, and the industry fears it is not out of the woods yet. H.R. 8, the American Taxpayer Relief Act of 2012, which was passed by Congress and signed by President Barack Obama, includes...