有人收到IRS的来信，代号是LTR 2645C吗？

很奇怪。以前报税以后从来没收到过。这次很莫名其妙。
而且里面就这么一段话，也没说是报税有问题问题或者什么的
很摸不着头脑啊

Thank you for your correspondence received Mar 14， 2013.

We haven't resolved this matter because we haven't completed all the research necessary for a complete response. We will contact you again within 45 days to let you know what action we are taking. You don't need to do anything further now on this matter.

google。或者照信上说的做——啥也不做