State tax shapes after-tax returns as much as federal rates do, and the fifty states do not agree on much. The map below covers rates on investment income, filing-status quirks, and estate taxes, state by state. For the harvesting angle, read Tax-loss harvesting in 50 states.
State tax rates on investment income
Fifty states, fifty tax personalities: how each state treats investment income, filing status, and estates, in one interactive map.