I did my own taxes and have for years. This year wasn't any different. My state refund was supposed to be "X" number of dollars. They accepted it, but then sent me a letter weeks later saying that the numbers didn't match what they had, and it was dropped down to $0. But I'm not sure where on my taxes the mix up was. I double checked everything before I hit submit. Didn't leave anything out. Just don't understand where the mix up was on my part.