It might seem trendy to file a tax return on a phone when you see it on the commercials, but in reality, the screen is small and you cannot see what you are doing. It is too easy to miss important things. Your tax return is too important to risk messing up by preparing it on a phone. Get to a computer or some other device with a larger screen. Messing up your tax return and spending months sorting out the mess will not be “cool.”