Can you claim your disabled girlfriend on your taxes. she was deamed disabled sept 1 2010 and received 1st check on oct 1 2010 so does she file taxes. and can i claim her on my taxes?

It depends on a LOT of factors: how long you have lived together, how much she earned, etc. Even if she were to meet the standards for a qualifying relative, you would only get an extra exemption for her: this means that you would have another standard deduction from your taxable income for the 2010 earnings year.

Even if she can be claimed, this does not mean you can file as married, nor would claiming her as a dependent make you eligible for head of household status. If there are children involved, they could make you eligible for that status.

My advice would be to have your taxes prepared professionally, and explain your situation to a qualified tax preparer. Bring all your necessary documentation with you and they will help you do the right thing.

P.S. If you see yourselves staying together, consider legal marriage. It is the most beneficial tax status.