It is not restricted to IB. Some did it already, some have yet to do it. All will have to comply at some point.
What really p**ses me off is the total lack of communication from IB. Just blocked. And I had a new system to run long term, now I can not.
That's IB. This is how they are. They charge cheap commissions but everything they do is cheap. For those of you who are affected by this KID stuff, change your broker to a US broker that is based in US. That's your only option.