HMRC's message · HTTP 400
Income sources data has changed. Trigger a new calculation
When it appears
Submitting a final declaration.
What to check
- Whether a business was added or ceased since the calculation.
How to fix it
Trigger a new final calculation, review it with the client, and declare that one.
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.