Automated Payment Transaction tax

The Automated Payment Transaction (APT) tax is a small, uniform tax on all economic transactions, which would involve simplification, base broadening, reductions in marginal tax rates, the elimination of tax and information returns and the automatic collection of tax revenues at the payment source. This proposal is to replace all United States taxes with a single tax (using a low rate) on every transaction in the economy.

Source: Wikipedia — Automated Payment Transaction tax (CC BY-SA 4.0)