4:30pm ET: This issue has been resolved and all impacted returns have been resent from our end. There is nothing you need to do at your site(s) other than waiting on the acks to come back. Acks should start to come back withing 30 minutes to a hour.
We are aware and actively looking into an issue where SSN’s that begin with zero (0) are being stripped from the SSN when transmitted causing a validation error. This post will be updated once the issue has been resolved. Please DO NOT resend impacted returns as they will only validate again.