Same Sex Couples Legally Married Are Now Treated As Married For Federal Tax Purposes - Good News For Property Owners

The IRS says that, if a same-sex couple is legally married, they will be treated as married for all federal tax purposes. The ruling applies regardless of whether the couple lives in a state that recognizes same-sex marriage or a state that does not recognizes it. 
The ruling also has important tax implications for same-sex couples who own real estate. For example, same-sex spouses who own a home and have a mortgage together will be able to claim the home mortgage interest deduction jointly on their joint tax return, like any other married couple. There is no need to split the deduction between them on their individual returns.

California (June 17, 2008) Connecticut (April 16, 2009) Delaware (July 1, 2013) Iowa (April 27, 2009) Maine (Nov. 6, 2012) Maryland (Jan. 1, 2013) Massachusetts (May 17, 2004) Minnesota (Aug. 1, 2013) New Hampshire (Jan. 1, 2010) New York (July 24, 2011) Rhode Island (Aug. 1, 2013) Vermont (Sept. 1, 2009) Washington (Dec. 6, 2012) District of Columbia (March 3, 2010) 

http://www.inman.com/2013/08/30/what-irs-recognition-of-gay-marriage-in-every-state-means-for-real-estate/#sthash.v0ggK4Z6.dpuf