<prompt> Human: My girlfriend, L, has lived with me for the past year, and made less than the income limit to be claimed as a dependent, and has received at least half of her support from me. Shes in a bit of a rut. I was entertaining the idea of claiming her on my tax return forms, and saw that if I were to do so, it would basically double my return which would be an awesome windfall, especially after buying her that stupid 200 cardigan she never wears.When I brought it up with her, she told me she was worried about her eligibility for healthcare coverage, given that when she signed up for help with getting coverage, the form required her to say she wasnt being claimed as a dependent I did not know about this prior. I wish I could tell you more about it right now - shes sleeping atm. Ill update this post if more info is needed.My question is, were I to claim her, would that affect her negatively in any way? While we could both use the extra money, I dont want to do it if it means losing or changing the plan shes currently on. Any and all advice is appreciated.  <response>: AFAIK it doesnt affect her ability to get healthcare coverage, but it might affect what she pays. If she got any subsidy or tax credit based on her income you will likely have to pay some or all of it back because the calculation will need to be redone based on household income which includes your income if you claim her as a dependent. 