Fellowship payments used for incidental expenses, including room and board, travel, and optional equipment are taxable. So too are amounts received for teaching, research, and other services required as a condition for receiving the fellowship. The only exception: amounts received for services required by the National Health Service Corps Scholarship Program or the Armed Services Professional Scholarship and Financial Assistance Program.
Writing off the cost of depreciable property over a period of years, usually its class life or recovery period specified in the tax law.