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ERROR: HMRC authentication doesn't complete

Troubleshoot HMRC authentication that doesn't complete when connecting an MTD for Income Tax client in AccountsPrep.

Written by Oliver Cook

HMRC may ask for additional identity information, or AccountsPrep may continue to show Cannot Connect after HMRC confirms authorisation.

  1. Check you're signed in with your agent HMRC account rather than your client's account.

  2. Clear your browser cache or open a private browsing window.

  3. Start the connection again.

  4. Complete any identity checks that HMRC requests.

  5. Return to AccountsPrep after HMRC confirms the authorisation.

  6. Try the connection again.

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