Do I need to amend for extra child income for dependents

If you have dependents who received unemployment compensation and/or earned income from working, the dependent files their own tax return to report the income received and indicates on their tax return that they can be claimed as a dependent.

You do NOT enter a dependent's earned  income or unemployment compensation on your tax return.

Or are you referring to something else?

The way the question is worded is confusing.   Are you trying to ask if you need to amend your tax return in order to get earned income credit?    If you received unemployment and filed before the tax law changed, then you might have to amend if the new tax break makes you eligible for EIC.   If you were already getting EIC on your original return you do not have to amend.

Please clarify your question.