Close don my first home June 4, 2008...eligible for tax Credit?

I singed and closed on my first home purchase in June of 08. I am the only signer and I am engaged not married and may file head of household but I may let her claim my daughter and me just the house. Anyway, I was wonder if I will be eligible for this first time home buyer tax credit that was created last year and how much. I heard it was more like an interest free loan than a tax credit but I am also uncertain of the amount.