<prompt> Human: Is it possible to claim a girlfriend over 25 on your taxes as a dependent if shes unable to work due to health reasons?  <response>: The person you wish to claim as a dependent: Must not have filed a joint tax return except to claim a refund Must be a US citizen, national, or resident alien Must have a taxpayer ID number usually SSN Must have received at least half of their support from you Must have a gross yearly income of less than 4050 Must not be a qualifying child of another person Must have lived with you all year as a member of your household.Source 