You will need to Amend each of your tax returns to make a change. Keep in mind, there are rules for claiming the Earned Income Tax Credit (EITC). See below for more details.
How to Amend?
https://ttlc.intuit.com/replies/3288565
What are the qualifications for the Earned Income Credit (EIC or EITC)?
https://ttlc.intuit.com/replies/3299933
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