Earl Warren,
Flora v. United States (362 U.S. 145…
“ Although a taxpayer may, after payment of his tax, bring suit for the recovery thereof and thus secure a judicial determination on the questions involved, he can not, in view of section 3224 of the Revised Statutes, which prohibits suits to enjoin the collection of taxes, secure such a determination prior to the payment of the tax. The right of appeal after payment of the tax is an incomplete remedy, and does little to remove the hardship occasioned by an incorrect assessment. ”
