The United States introduced the earned income tax credit (EITC) in 1975, where it remains the most significant earnings-based refundable credit in the Internal Revenue Code.
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While the United States was the first country to use its domestic revenue system to deliver and administer social welfare benefits to lower-income individuals or families, a number of other countries, including New Zealand and Canada, have experimented with or incorporated similar Credits into their tax systems.
The United States introduced the earned income tax credit (EITC) in 1975, where it remains the most significant earnings-based refundable credit in the Internal Revenue Code