Allowance Exchange is a job that involves the exchange of money or goods for services. It is a form of bartering, where two parties agree to exchange something of value in order to receive something else of value. TRET (4 letters) is an acronym for Tax Return Exchange Transaction, which is a type of Allowance Exchange. This type of transaction involves the exchange of tax returns for goods or services. It is a way for people to get the most out of their tax returns without having to spend the money on items they don't need.