Changing Your Company's Accounting Period: How It Affects Your CT600
What happens to your CT600 when you change your accounting period? Guide to the rules, restrictions, and filing implications.
Plain-English guides to UK Corporation Tax and CT600 filing.
What happens to your CT600 when you change your accounting period? Guide to the rules, restrictions, and filing implications.
How to claim a corporation tax refund from HMRC. Covers overpayment, amended returns, loss carry-back, and how long refunds take.
CT600 supplementary pages explained: CT600A to CT600E. Find out which ones your company needs and how to complete them.
How marginal relief works for Corporation Tax in 2025/26. Step-by-step calculation for profits between £50,000 and £250,000.
Find out how long HMRC takes to process your CT600 company tax return, when you'll get your tax calculation, and what to do if it's taking too long.
Free CT600 filing software compared. What happens when HMRC stops free filing in March 2026 and what to use instead.
Find out whether your limited company needs to file a CT600 Corporation Tax return with HMRC. Covers dormant companies, new companies, losses, and exemptions.
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.
What iXBRL accounts are, why HMRC requires them with your CT600, and how to generate them without expensive software. Plain English guide for company directors.
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.
Corporation tax guide for freelancers with a limited company. Covers allowable expenses, IR35, dividends, and filing your CT600.
A complete walkthrough of every CT600 box and section. Understand what each field means, which boxes apply to your company, and how to fill them in correctly.