Get your taxes done using TurboTax

When I try to exit Turbotax, the program asks me if I want to save the file. When I click yes, it tries to save then comes back with an error message stating that "Couldn't save file because it is a read only file....use save as to rename it or move it. When I try to rename it, it still won't save. I've never had this problem before with TT, and now I feel like I'm either going to lose all my entries or that I will not be able to save the file after I'm totally finished. Help, please