Hi guys! I just received a letter in my business mail (Earthclass) from the IRS with the words "Penalty for private use $300" printed on the outside. Unfortunately, I couldn't scan it to open it. I'm not sure what it could be about. I recently established my company in the US, and I haven't conducted any business yet. I mean, literally, I haven't done anything. Do any of you have a clue what this could be? How can I verify if it's legitimate or if I need to pay it?