The CalEITC is a tax credit that can be refunded and can increase your tax refund or reduce the amount of taxes you have to pay. The amount of CalEITC depends on your household status, income, and family size. The CalEITC is a tax credit that can be refunded and can increase your tax refund or reduce the amount of taxes you have to pay. The amount of CalEITC depends on your household status, income, and family size.