https://www.investopedia.com/terms/s/stepupinbasis.asp https://www.peoplestaxpage.org/buy-borrow-die
Basis step up should be eliminated though. I can't see any economic justification for it.
https://www.investopedia.com/terms/s/stepupinbasis.asp https://www.peoplestaxpage.org/buy-borrow-die