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Really?  This is a "community" forum.  How the hell would you think anybody knows who the hell Kathleen Davis is to you?  Did you actually expect someone at TT to look at last years return and then tell you why the change?  You got to be kidding me!  That being said, what is her relationship to you?  How old is she?  How much money does she make?  Is she a full time student?  ... Go look up the rules for dependents on the IRS website!