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I have my wife's secound cousin 27 years old and her child 1 year old. Living with me since 4/01/2019 .She does and has not worked since living with me . I support both can I claim both on my 2019 tax.Him as dependent and her as a quailfying adult with no income.

Also if not filed 2019 will I or her get the Corinivirus stimulus check for them .She has not filed in several years.If I am able to claim them will I get the dependent part later even if I recieve mine now.