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File your UK Corporation Tax CT600 return online. Simple, affordable, HMRC-compliant.

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Plain-English guides to UK Corporation Tax and CT600 filing.

3 results for “government gateway”Clear search
23 February 2026

HMRC Government Gateway for Corporation Tax: Setup & Navigation Guide

Step-by-step guide to setting up and using HMRC Government Gateway for Corporation Tax. How to register, enrol for CT, view your account, and manage your tax.

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21 February 2026

How to Use HMRC Government Gateway to File Your CT600

Step-by-step guide to setting up and using your HMRC Government Gateway account to file your CT600 Corporation Tax Return online.

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21 February 2026

CT600 Filing Agent Authorisation with HMRC

How to authorise an agent to file your CT600. Step-by-step guide to HMRC agent authorisation for corporation tax — online, by post, and what to do if things go wrong.

ct600hmrcagent authorisationcorporation taxfiling agentaccountantgovernment gateway