3 weeks ago I received a refund check from the US treasury. The check appears to be genuine. I have not received any correspondence from the IRS explaining why I was sent the check. I have verified that I included all the estimated payments I made. How do I find out why I received the check and whether or not I need to return it or can I just cash it. I have tried to call the IRS, but they are not answering they phones. I have not been able to get any response from Turbo tax
