If you (and your family) do not live at your tax home, you cannot deduct the cost of traveling between your tax home and your family home. You also cannot deduct the cost of meals and lodging while at your tax home. See Example 1.
If you are working temporarily in the same city where you and your family live, you may be considered as traveling away from home. See Example 2.
Example 1. You are a truck driver and you and your family live in Tucson. You are employed by a trucking firm that has its terminal in Phoenix. At the end of your long runs, you return to your home terminal in Phoenix and spend one night there before returning home. You cannot deduct any expenses you have for meals and lodging in Phoenix or the cost of traveling from Phoenix to Tucson. This is because Phoenix is your tax home.
Example 2. Your family home is in Pittsburgh, where you work 12 weeks a year. The rest of the year you work for the same employer in Baltimore. In Baltimore, you eat in restaurants and sleep in a rooming house. Your salary is the same whether you are in Pittsburgh or Baltimore.
Because you spend most of your working time and earn most of your salary in Baltimore, that city is your tax home. You cannot deduct any expenses you have for meals and lodging there. However, when you return to work in Pittsburgh, you are away from your tax home even though you stay at your family home. You can deduct the cost of your round trip between Baltimore and Pittsburgh. You can also deduct your part of your family's living expenses for meals and lodging while you are living and working in Pittsburgh.
Information courtesy of the Internal Revenue Service.
