Can delete dependent feom efile that was rejected?

Yes, you can delete the dependent from your return that was rejected. 

If you need to revisit the Dependents section in TurboTax Online, here's what you do:

1. Open your return in TurboTax, if you aren't already in it. (To do this, sign in to TurboTax and click the Take me to my return/Fix my return button.)
2. Search for personal information and then click the "Jump to" link in the search results.
3. Follow the onscreen instructions to add or remove a dependent.

In doing that, will it automatically remove the dependent from the state return also?

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@SashaGriffin wrote:

In doing that, will it automatically remove the dependent from the state return also?

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Yes.