<prompt> Human: I filed my taxes a month ago and electronically paid 2,500 via turbo tax. I assumed all was good until I received an envelope from the US Dept of the Treasury. Inside was a check for 100 and two inserts. I assumed at first it was one of those advertisements that get sent out with a fake check like You should spend your tax return with us! it also had a myRA insert advertising to invest your return. I thought it a little weird the Dept. of Tres. was sending an advert, but hey Trump is president so anything can happen.nbsp;I took a second glance at the check expecting to find the THIS IS NOT A CHECK written somewhere like all the fake checks have but instead I just found HOLD TO LIGHT TO VERIFY WATERMARK which there was a watermark. So its either a weird scam, REALLY shady advertisement, or some mistake that they sent me 100 free?nbsp; Things dont add up and Im very confused. Any help is appreciated.TLDR; Owed Taxes, Paid, was sent refund check which I assumed was an advertisementscam but everything looks legit. What do?  <response>: If the IRS believes you filed an incorrect return they may have adjusted your refund or amount owed without notifying you. If you have questions there is an IRS phone number to call and speak with a representative. They will verify your information and answer any questions you may have. If it is a check then put it in the bank and move on. The MyRA slip came in my refund as well and I put it into the round file.My best guess is that your return was corrected by the IRS and they are sending you the difference. 