So basically, have a Global config option to set Tax Settings, and then expose a new option within a plan to “inherit from global” instead of defining it locally (like it works today).

Perhaps, this concept could be replicated for Bond config, Growth rates, Drawdown order, etc ?

Question to my mind, if you’re inside a plan, and you modify these settings when they’re inherited, does it change the global setting (thus updating all plans that inherit this), or does it instantly disconnect you from the global setting and define it locally.

My gut tells me local settings should override the global settings without changing them. If you want to change the global settings, then you should only do that at the source because it will affect all other plans.

Example: One plan is defined as retiring in the state I currently live in. Another plan overrides the global for my current state and changes it to a new state at some milestone (I currently do that in a milestone with tax consequences). I could just as easily decide to retire to another country. This isn’t the best example, but I wouldn’t want plan changes to cascade upwards in any case.