Keep in mind that if the FBI has you dead to rights on a serious criminal offense, they often let you retroactively clean up your paperwork (i.e. get legal) if you’re cooperating with the investigation/providing useful information on other high-value targets. I’m not saying Kushner’s cooperating, but he’s the latest in a string of Trump admin officials who have developed a sudden interest in getting their paperwork accurate & truthful at just about the same time their only other plausible escape route is a Presidential pardon (e.g. Flynn).
It’s also just as possible he’s following the family tradition of changing justifications every time he gets caught lying about the last one. But it’s an encouraging possibility–and we may never know what sort of deals were made–we’ll just see some people serving shorter sentences for less serious offenses than others.
That said, he could be cooperating and jockeying for a pardon, which is a pretty nonsensically over-the-top blinkered and self-centered chaotic fuck-everyone-else approach, which makes it a strong candidate in this instance too.