Yes I also have received letter 4464C. I have won over 300k in gambling and my refund is very high amount that I am getting back and from my understanding this 4464c is the IRS overlooking your tax return to make sure everything is reported accurately. If you go from making about 30k to now over 300k of course this would be a red flag for my return to get pulled and that is exactly what happened. It sucks and I know for sure does not take freaking 69 days to complete. That too long. But hopefully the ball will be moving faster. Let’s just stay positive and prey everything works out. Good luck to everyone
