Expert insights
for UK directors

A comprehensive guide to the UK company tax return (CT600). Learn what a company tax return is, who needs to file one, key deadlines, how to complete it, and the easiest way to submit your company tax return online.

With HMRC's free filing service closing in March 2026, choosing the right CT600 software is more important than ever. We compare WeFile against TinyTax, TaxPipe, TaxCalc, and TaxFiler to help you find the best option for your business.

Meet the WeFile AI Assistant — a built-in, context-aware AI that helps you navigate CT600 submissions, Companies House filings, and tax calculations with confidence. Free for all users with 10 queries/month, or upgrade to AI Pro for 500 queries/month.

Everything UK businesses need to know about Making Tax Digital for VAT — from who must comply and what digital filing involves, to how WeFile will soon let you submit VAT returns to HMRC for free.

Missing your corporation tax deadline can be costly. Learn every key date, penalty threshold, and interest charge — plus how to avoid them with timely CT600 and Companies House filings.

Learn how WeFile automatically generates your statutory accounts, tax computation reports and CT600 corporation tax return forms — available for instant download in PDF and iXBRL format directly from your filing detail page.

WeFile's new Tax Adjustments section in the filing wizard automatically handles capital allowances, depreciation add-backs, trading losses, and corporation tax calculations — making your CT600 filing faster and more accurate than ever.

Made an error in a previously submitted CT600 or Companies House return? WeFile now supports filing amendments — allowing you to correct and resubmit your corporation tax and annual accounts without starting from scratch.

WeFile now supports team accounts with role-based access control. Invite your colleagues as admins, editors, or viewers and collaborate on CT600 and Companies House filings together.

A comprehensive guide to the WeFile REST API — how it works, what it costs, and how developers and accountancy practices can integrate programmatic corporation tax and Companies House filing into their own software.