The Earned Income Tax Credit (EITC) is a tax credit designed to help low- to moderate-income workers and families get a tax break. This credit is not as straightforward as other credits, but for more information, visit the IRS’ page on it.
What someone would need to calculate it for their return:
Form 1040 or Form 1040-SR
Use the EITC Assistant
Schedule EIC (may not be necessary)
Pro Tip: To see if you received the credit, it can be found on the following lines for each tax return form:
2017 1040: Line 66a
2017 1040A: Line 42a
2017 1040EZ: Line 8a
2018 1040: Line 17a
2019 1040: Line 18a
2019 1040-SR: Line 18a
If you did not receive it and you should have, you can amend your return with a 1040X.