Here's the thing most international tax articles won't tell you: by the time you walk into a U.S. embassy to renounce your citizenship or file Form I-407 to abandon your green card, your exit tax exposure is already fixed. There is no going back, no last-minute restructuring, and no do-over. The exit tax under IRC Section 877A doesn't care when you start planning. It cares about what your financial life looked like on the day before you left. That's why identifying the warnin