How do I get back in to sign my return and send it

When you log into your account if you have not sent your return it will still open.  If you have efiled your return, the status will show as pending.

If your return shows as pending you did sign and complete it.  Now you just wait for it to be accepted or rejected.

I received an email saying I did not sign my return Now what?

can I talk to someone?

Yes you can talk to some on TurboTax Live.  You can click right in your return to speak to someone.  If you already have TurboTax Live it is free.