HMRC's message · HTTP 400
For customers with ITSA status 'Annual' or a latent business income source, submission period has to be 6 April to 5 April
When it appears
Sending a self-employment update for a client HMRC does not treat as quarterly.
What to check
- The client's Making Tax Digital status for the year in HMRC's records.
- Whether the business is a new or dormant income source HMRC has marked as latent.
How to fix it
Send one update for 6 April to 5 April, or, if the client should be quarterly, resolve their status with HMRC first.
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.