My girlfriend and her daughter have been living with me for 7 years. She claims her daughter as a dependent. I never have claimed her as a dependent but am I allowed to?

[fanfare · Accepted solution]

If you claim her, she loses her daughter as a dependent. And you can't claim the daughter because she is her qualifying child.

So you may accomplish nothing. But it depends on who gets the most benefit from one dependent.

[fanfare]

Anyway, if your girlfriend makes over $4,050 you can't claim her.