We have received the following advice from HMRC. Earlier in the week we or our customers experienced RTI submissions giving a partial failure. The HMRC site allowed software to acknowledge and upload submissions. It then failed to give the appropriate response. As far as we can determine the HMRC site was partially unresponsive for the entire morning. It appears that the problem is re-occurring:
11th July 2017:
Corporation Tax: HM Revenue and Customs (HMRC) are aware of problems processing receipt of some Corporation Tax online message submissions. This is under urgent investigation. Please do not resubmit.
PAYE: HMRC are aware of problems processing receipt of some PAYE message submissions. This is under urgent investigation. Please do not resubmit.
Self Assessment: HM Revenue and Customs are aware of problems processing receipt of some Self Assessment message submissions. This is under urgent investigation. Please do not resubmit.