HMRC's message · HTTP 403
The remote endpoint has indicated that the submission is for a tax period that has not ended
When it appears
Submitting a VAT return.
What to check
- The period end date on the obligation.
How to fix it
Submit after the period ends.
Making Tax Digital in Accountin
Accountin shows HMRC's code and message next to a plain explanation, and keeps HMRC's reply against every submission.