The refund of money with your California Earned Income Tax Credit (CalEITC) is a refundable tax credit that can reduce the amount of taxes you owe or increase your tax refund. The credit amount varies based on income and family size. The refund of money with your California Earned Income Tax Credit (CalEITC) is a refundable tax credit that has the potential to decrease the amount of taxes you owe or potentially enhance your tax refund. The credit amount fluctuates depending on income and family size.