Do you own a home or real property of some sort? If so, you have to pay a local government (usually a county) real estate taxes on that property every year. Sometimes you pay twice a year, other times annually and if you have your taxes impounded with your mortgage, you pay monthly and the deductible amount is given to you along with your form 1098 mortgage interest statement.
Here is a link to IRS Publication 17 – click on ‘Real Estate’ and it will give you more information.
http://www.irs.gov/publications/p17/ch22.html#en_US_2011_publink1000173165
If you have questions call me at 818-317-6035 or email me at bstonercpa@sbcglobal.net and we can discuss it.
Tomorrow I will discuss personal property tax deductions, like cars and trucks, boats and airplanes. 
You can count on us to count for you!