In some situations an asset may have one basis for regular income tax purposes and a different basis (usually higher) for alternative minimum tax purposes. (fairmark.com)
Your age being in the early 70s is a «sweet spot» to increase the amount of regular income for life. (moneysense.ca)
And the 10 % wealth - grab would, of course, be on top of regular income taxes, sales taxes, property taxes, etc.. (countingpips.com)