Your Company's First Year? Here's Why You Probably Need Two Tax Returns
Almost every new company's first accounting period exceeds 12 months, meaning HMRC requires two separate CT600 returns. Here's how it works and how Taxpipe makes it easy.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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CT600 Penalties for Late Filing — What Happens If You Miss the Deadline
HMRC charges escalating penalties for late CT600 filing, starting at £200 for filing dates on or after 1 April 2026. Here's exactly what happens, how to avoid penalties, and what to do if you've already missed the deadline.
Dormant Company CT600 — How to File a Nil Return
If HMRC has asked your dormant company for a return, you still need to file a CT600. Here's how to file a nil return quickly and avoid penalties — even if your company did nothing all year.
How to File CT600 Online After HMRC Free Service Closed
Step-by-step guide to filing your CT600 corporation tax return online using commercial software after HMRC discontinued its free filing service in March 2026.
HMRC Free CT600 Filing Is Ending March 2026 — What You Need to Do Now
HMRC is closing its free Corporation Tax filing service on 31 March 2026. Here's what this means for your company and the cheapest alternatives.
What Is iXBRL and Why Does Your CT600 Need It?
Plain English explanation of iXBRL — the tagged format HMRC requires for CT600 accounts and tax computations. What it is, why it matters, and how to create it.
HMRC Free Filing Software Is Closing March 2026 — What Now?
HMRC is shutting down its free CT600 filing service on 31 March 2026. Here's what it means for your company and the cheapest alternatives.
10 CT600 Mistakes That Get Your Return Rejected by HMRC
The most common CT600 filing mistakes that cause HMRC rejections. Learn what to avoid so your Corporation Tax return gets accepted first time.
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.
HMRC Free CT600 Filing Service Closed March 2026: What You Need to Do Now
HMRC closed its free Corporation Tax filing service on 31 March 2026. What this means for your company and how to file now.
Best CT600 Filing Software UK 2026: Complete Comparison Guide
Comprehensive comparison of all CT600 filing software options in the UK for 2026. Features, pricing, pros and cons of every HMRC-recognised option.
TinyTax Alternative: Compare CT600 Filing Software for 2026
Looking for a TinyTax alternative? Compare features, pricing, and HMRC compliance. Taxpipe offers CT600 filing at £59 with full iXBRL support.