HMRC's message · HTTP 400
Period summaries are not contiguous
When it appears
Sending a quarterly update for self-employment or property income.
What to check
- The end date of the last update HMRC accepted for this business.
- The start date of the update you are sending.
How to fix it
Start the update the day after the previous one ended.
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.