After you file

That is what I thought too. I worked so hard to get the numbers exact on TT and then to have received this letter.  I find it interesting that someone, I presume, physically goes through the 1040 and reviews it and decides that I made an error and sends me money.  I would have thought that the computers do the analysis and by using TT, each line item would be accurate. Makes me wonder how many more people received such a refund....