If your Earned Income Credit (EIC) was disallowed or reduced for something other than a math or clerical error, you may need to file Form 8862 before the IRS allows you to use the credit again. Be sure to follow the instructions from the IRS if you received a notice requiring you to file Form 8862. You do not need to file Form 8862 in the year the credit was disallowed or reduced.
Here's how to file Form 8862 in TurboTax.
Sign in to TurboTax and select Pick up where you left off or Review/Edit under Deductions & Credits
Select Search, enter Form 8862, and select Jump to form 8862
You'll come to the Earned Income Credit section. Select Continue
Answer the questions. When you get to, Do any of these uncommon situations apply? check the box that says, I/we got a letter/notice from the IRS telling me/us to fill out an 8862 form to claim the Earned Income Credit
Select Continue and then Done
On the Since you got an IRS notice, we need to check on a few things screen, select the radio button next to No, none of these apply and I need to fill out the 8862 form