HMRC submission errors

What HMRC's rejection messages usually mean and how to get your return submitted.

Last updated 10 July 2026.

If HMRC does not accept a return, the message almost always points to authorisation or timing rather than your figures.

What the messages usually mean

Authorisation expired or missing. Reconnect from Settings → HMRC - see Connect Kontala to HMRC.
No open obligation. HMRC only accepts a return once the period is available to file. Wait until the period opens.
Return already submitted. The period may have been filed elsewhere before you moved to Kontala.

Fix the cause above and try again - most rejections clear after reconnecting to HMRC. Full steps are in Fix a rejected submission.

If HMRC keeps refusing a return you believe is due, contact our team with the period and the exact message, and we will help.

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