Tax Foundation. December 2020. Congress passed a new COVID-19 relief package that includes another round of Economic Impact Payments for struggling Americans and a “look-back” adjustment for the federal Earned Income Tax Credit (EITC) and Child Tax Credit (CTC) that allows taxpayers to use their 2019 income to determine their credit eligibility and value for tax year 2020. https://taxfoundation.org/coronavirus-relief-bill-stimulus-check/