From IR-2008-18:
"Qualifying income includes Social Security benefits, certain Railroad Retirement benefits, certain veterans’ benefits and earned income, such as income from wages, salaries, tips and self-employment. While these people may not be normally required to file a tax return because they do not meet the filing requirement, the IRS emphasizes they must file a 2007 return in order to receive a payment."
"Qualifying income includes Social Security benefits, certain Railroad Retirement benefits, certain veterans’ benefits and earned income, such as income from wages, salaries, tips and self-employment. While these people may not be normally required to file a tax return because they do not meet the filing requirement, the IRS emphasizes they must file a 2007 return in order to receive a payment."
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