If you are locked out of your TurboTax account, see this help article for detailed instructions to recover your account.
If you need additional assistance, contact TurboTax Support.
If your return was rejected but you didn't see an email with an error code, search for an ACTION NEEDED! email from turbotax@intuit.com. It will give you a brief explanation of your rejection and how to fix it. Check to see if the email may have been routed to a junk folder.