It is quite a famous argument from Muslims for authenticity of the Quran that the previous Holy Books (Bible and Torah) sent by God have been corrupted or changed by their followers and that Quran is the only one which remains intact in its original form. Though they never provide any evidence for this claim against today's Torah, it is still one of the main arguments.
What is the counter argument to this claim according to Jewish teachings? Have there been any later versions, additions or omissions in/from the Torah? Or is it really the original one according to Judaic teachings? And what evidence can be presented to dismiss this Muslim claim?
Note: This question isn't meant to be for ridicule or anything. It's just academic curiosity. So I apologize if this causes any sort of offence. I'm not very knowledgeable about Jewish religion.