<prompt> Human: REcently, helped my girlfriends little sister with her taxes because she said her dad was too busy to do them this year. I said sure and ill even teach you how to do them for the future because its a helpful skill to have. While going thru everything it asks if anyone else can claim her as a dependent. i go to click no because she hasnt lived at home for 3 years and she said no dont do that my dad said he already claimed me on his taxes. I said are you sure? you dont live with him and he doesnt pay for anything for you so i am not sure he can claim you. she yea thats what he told me to tell you when i said you were gonna help me. So filled out the rest of the 1040ez but didnt file it yet because wanted to get someone elses opinion on this. I am also going to ask her brothers if their dad claimed them as well. They also havent lived in the house for over 2 years and want to know more about it. If he did file and claim here what are the best results moving forward for her taxes?  <response>: Show her the IRS guidance and explain the ramifications to her. Then remove yourself from the situation. Youve got nothing to gain here by inserting yourself into this matter. 