You should amend your return (if you already filed) to remove any child's w-2. If your child(ren) have their own w-2s, they report those on their own tax returns.
If you have not filed your return, search for W-2 and use the jump to w-2 link to get back to your W-2 summary where you can remove his w-2 from your return. If your return was already filed and accepted, see this TurboTax FAQ for amending instructions.