wIggy

I'm don't know if this thread is dead or not, but here's where I stand...I just moved out due to the lease being up, I paid my half's month rent, since I was only occupying the residence up to the 15th. I tried to return the keys on the 15th (which was Friday) at around 2pm, there was nobody there, and the sign on the door say will return 9:00. I figured this meant 9am Monday, so I left a note saying I had been by, and please call to arrange a drop off time for the keys. I got a phone call from the property management company today, and she told me "oh I had just went to the bank, and when I came back I got your note" I think she's trying to set me up, I'm giving the keys to her today, and she told me I would get my deposit back this week, and then mentioned something about professional shampooing the carpet, I have no Idea what she's talking about, whether I'm responsible for it or not? I don't have my copy of my lease on me, (I know, dumb mistake) but if she tries to jip me out of my deposit (there is NO damage to the place, and it's clean) what should I do? Anything I could say to get her attention, without sounding too aggressive?