Assuming you were away from home, on business, overnight, you can use a perdiem rate instead of actual meal costs. For travel on business, overnight, away from
home the per diem rate varies from location to location. From IRS Publication
17: "Amount of standard meal allowance. The standard meal allowance is the
federal M&IE rate. For travel in 2014, the rate for most small localities
in the United States is $46 a day: For
2015 the rate in most small localities is $51 a day." For more specific
rates, see http://www.gsa.gov/perdiem as
the actual rate depends on the location of your travel. (Note that you need to
set the year in the drop down box just above the map.)
If you were not away overnight, your meals are not deductible.