I didn't file taxes in 2008 because I was not employeed, I made no taxable income. But,I did purchase a home.?

I understand that if you have made no taxable income for the year you are not required to file income taxes. Are you supposed to file for taxes although you have not worked nor made any taxable income? I was told by several friends that you are supposed to file taxes anyway. Is this true? Since I did purchase a... show more I understand that if you have made no taxable income for the year you are not required to file income taxes. Are you supposed to file for taxes although you have not worked nor made any taxable income? I was told by several friends that you are supposed to file taxes anyway. Is this true?
Since I did purchase a home in 2008 should I have filed just to claim the credit that everyone is talking about?
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