UK HMRC published new guidance on 17 February 2026, Check if and when you need to register as a tax adviser with HMRC, with related guidance, Check if you meet HMRC's conditions to register as a tax adviser.
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Check if and when you need to register as a tax adviser with HMRC
Check if and when you need to register for an agent services account to interact with HMRC on behalf of your clients.
Changes to registration
From 18 May 2026, HMRC will introduce an online registration system …