This is another site that specifically disputes Tobit and says why http://www.jashow.org/Articles/apologetics/AP0704W2.htm:
Look, I am making sport of hypocrisy because of the seemingly arbitrary nature of your arguments. I know that the essence of Scripture is more important than the punctuation. Since I recognize Tobit to be Scripture AND accept the argument that Scripture cannot be errant. Therefore, either science and history are as wrong with respect to Tobit as they are to Judith, Chronicles, Kings and other books, or we have to disregard significant portions of Scripture.