Error: Cannot connect to HMRC

Go to your HMRC Personal Tax Account and look for your income sources.

If no active source appears here, Sole Trader can't connect because HMRC doesn't recognise the record.

If you've recently started self-employment or begun receiving UK property income, this can take up to 10 working days.

It's possible that HMRC is currently processing your registration.

You could have more than one Government Gateway login. Check you're signed in with the account linked to your Unique Taxpayer Reference (UTR) and Self Assessment record.

A mismatch between accounts will prevent the connection from completing.

MTD for Income Tax covers self-employment income and UK property income held in your own name.

Income received through a limited company, partnership, or as an employee doesn't connect through this route.

When connecting Sage to HMRC, you must complete the full HMRC authorisation journey and receive a confirmation from HMRC at the end.

If you've navigated away before receiving that can cause the authorisation to fail. Authorisation also expires over time. Previously connected and now see an error? Repeat the authorisation journey from the start.

HMRC needs to recognise your income source in the correct tax context for the connection to work.

Check the income is declared on a prior Self Assessment return under the correct category. Confirm it’s held personally, not through another legal structure.

Stopped and restarted a business or registered multiple income sources? Old records may exist alongside your active one.

This can cause the wrong record to surface during the connection, log in to your HMRC account and confirm which sources show as active.