HMRC's message · HTTP 400
totalVatDue should be equal to the sum of vatDueSales and vatDueAcquisitions
When it appears
Submitting a VAT return.
What to check
- Boxes 1, 2 and 3, including rounding.
How to fix it
Make box 3 the sum of boxes 1 and 2, and resend.
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.