HMRC's message · HTTP 400
The quarterly period type cannot be changed when a business commencement date falls between 1st and 5th of April, and the current date is also within that date range but later than the business commencement date
When it appears
Changing a business between standard and calendar quarters in early April.
What to check
- The business start date HMRC holds.
- Today's date.
How to fix it
Make the change after 5 April.
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.