This calculator will help you estimate the amount of your 2021 Child Tax Credit. Half of is available in the form of monthly advanced payments, the other half will be included in your 2021 tax return. The IRS will use your 2020 tax information(or 2019, if applicable) to determine your eligibility and automatically enroll you for advanced payments. For more information, visit irs.gov. To use the calculator, answer the questions with the information you provided in your most recent tax filing.