If your circumstances change.

HMRC07/09/2026

Taxpayers signed up for Making Tax Digital for Income Tax must update their details via their HMRC online account or software if their circumstances change. This includes processes for opting out if income falls below thresholds, applying for exemptions, managing insolvency, or changing software and tax agents. You must ensure all digital records remain accessible and securely stored for at least five years from the relevant submission deadline.

Source: https://www.gov.uk/guidance/use-making-tax-digital-for-income-tax/if-your-circumstances-change. Summarised automatically from the official source — general information, not advice.