I expect that you got a rejection code F1040-164-01. Depending on your version of TurboTax, one of these links should help you.
CD/Download instructions for E-file reject F1040-164-01: Form 8862 is missing from the tax return and it is required to be able to claim the earned income credit (EIC)
I added form 8862 as requested and taxes still rejecting
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