We have received 3 letters from plan sponsors in the past week that Form 5500 EZ plans filed their forms late with huge penalties. All three forms were filed on time. Has anyone else had plan sponsors receive these letters? We've asked ASPPA and we haven't received a response yet and our plan sponsors are obviously concerned. We tried to call the IRS and got a message that due to high volume to call back tomorrow. Any advice on how to find out if these were sent out in error to EZ plans? Thank you!