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

20 results for “step-by-step guide”Clear search
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
21 February 2026

How to Appeal a CT600 Late Filing Penalty from HMRC

Got a CT600 late filing penalty? You may be able to appeal. Step-by-step guide to HMRC penalty appeals, reasonable excuses, and time limits.

ct600penaltyappealhmrclate filingreasonable excusecorporation tax
21 February 2026

How to File a Nil CT600 Return for a Dormant Company

Step-by-step guide to filing a nil Corporation Tax return for your dormant limited company. Avoid penalties — even dormant companies must file with HMRC.

CT600dormant companynil returnHMRCcorporation tax
21 February 2026

HMRC Corporation Tax Online Account: How to Set Up and Use It

Step-by-step guide to setting up your HMRC Corporation Tax online account. Register, activate, and manage your company tax — including how to file your CT600.

HMRCcorporation taxonline accountGovernment Gateway
20 February 2026

How to File Your CT600 Without an Accountant — Complete Guide

Step-by-step guide to filing your CT600 without an accountant. What you need, how to calculate tax, and how to avoid mistakes.

CT600self-filingcorporation taxno accountantDIY tax returnsave money
20 February 2026

Closing a Limited Company — Your Final CT600 and What to Do

Step-by-step guide to closing your limited company. Final CT600, capital distributions, strike-off vs MVL, and the mistakes that cost directors money.

closing companyfinal CT600strike offMVLcorporation taxlimited company
19 February 2026

How to Register for Corporation Tax: Step-by-Step Guide for New Companies

Complete guide to registering your limited company for corporation tax with HMRC. Deadlines, what you need, UTR numbers, and what happens after registration.

19 February 2026

How to Pay Corporation Tax to HMRC — All Payment Methods Explained

Step-by-step guide to paying your Corporation Tax bill. Bank details, payment references, deadlines, and what happens if you pay late.

corporation taxHMRCpaymenttax paymentdeadlines
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