SelfSubmit is designed to help you stay compliant with HMRC Making Tax Digital requirements. You remain responsible for ensuring the information you submit is accurate.

All MTD categories

Category 16

MTD Sign Up

Sign up for Self Assessment first, then register for MTD for Income Tax when required.

What it is

Signing up involves registering for Self Assessment (if needed), choosing compatible software, and authorising it to interact with HMRC. HMRC may invite you when you approach the income threshold.

Who it applies to

Newly self-employed people, landlords crossing the threshold, and businesses starting to trade.

What you need to do

  • Register for Self Assessment by 5 October after the tax year you started.
  • Follow HMRC letters or messages about MTD sign-up dates.
  • Authorise your software using your Government Gateway credentials.

Key points

  • You need a Government Gateway user ID and password.
  • Keep your contact details updated in your HMRC account.

Official HMRC links