HMRC's message · HTTP 400
The final declaration has not been received
When it appears
Triggering an amendment calculation.
What to check
- Whether the final declaration was accepted.
How to fix it
Make the final declaration first.
Making Tax Digital in Accountin
Accountin will send VAT returns and income tax updates to HMRC once HMRC grants it live access. It then shows HMRC's code and message next to a plain explanation, and keeps HMRC's reply against every submission.