HMRC service temporarily unavailable
HMRC is carrying out scheduled maintenance on the Making Tax Digital for Income Tax service. During this time, you won't be able to submit updates to HMRC through TaxNav.
Maintenance details
What you need to know during
the HMRC maintenance window
Maintenance window
Friday 20 March 2026, 5:00 PM GMT – Tuesday 24 March 2026, 1:00 PM GMT
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What's affected
Making Tax Digital for Income Tax — all submission and update endpoints, including quarterly updates, final declarations, and HMRC communication.
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What won't work
Submitting quarterly updates, viewing your tax calculation from HMRC, and sending final declarations will be temporarily unavailable.
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What still works
You can still log into TaxNav, add income and expenses, import spreadsheets, and prepare your records. Everything will be ready to submit once HMRC is back online.
Last updated: 20 March 2026