HMRC Free CT600 Filing Has Closed: What Are Your Options?
HMRC withdrew its free CT600 filing service on 31 March 2026. Learn what this means for your company, your options for filing going forward, and how to switch to affordable software.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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HMRC Business Tax Account: How to Access and Manage Your Corporation Tax Online
Complete guide to HMRC Business Tax Account for limited companies. Learn how to register, access your corporation tax records, check deadlines, view payments, and manage your CT600 obligations online.
Sage CT600 Filing: Can You File Corporation Tax Through Sage?
Sage Accounting does not file CT600 returns to HMRC. Learn what Sage does for corporation tax, its limitations, and how to pair it with Taxpipe for affordable CT600 filing.
Filing a CT600 for a Short Accounting Period: Complete Guide
Need to file a CT600 for a period shorter than 12 months? Learn when short periods happen, how tax is calculated, financial year splits, and how to avoid HMRC rejection errors.
QuickBooks CT600 Filing: Can You File Corporation Tax Through QuickBooks?
QuickBooks does not file CT600 returns to HMRC. Learn what QuickBooks does for corporation tax, its limitations, and how to pair it with Taxpipe for affordable CT600 filing.
FreeAgent CT600 Filing: Can You File Corporation Tax Through FreeAgent?
FreeAgent can file CT600 returns for most micro-entities directly with HMRC. Learn what FreeAgent covers, where it falls short, and when Taxpipe is a better fit for your CT600 filing.
Research & Development (R&D) Tax Credits on CT600: SME Guide 2026
Complete guide to claiming R&D tax credits on your CT600. Covers the merged R&D scheme, qualifying expenditure, CT600L supplementary page, HMRC compliance checks, and cash credits vs tax reduction.
How to Correct a CT600 Mistake: Amending Your Corporation Tax Return
Made an error on your CT600? Learn exactly how to amend your corporation tax return, HMRC time limits, penalties for mistakes, and how to fix common CT600 errors step by step.
What Happens If You Miss the CT600 Deadline? Penalties, Interest & How to Fix It
Missed your CT600 deadline? Learn the exact HMRC penalty structure — £200 initial then 10% and a further 10% for filing dates from April 2026 — how late payment interest works at 7.75%, and the steps to fix it fast. Plus how to appeal.
How Much Does CT600 Filing Cost? Accountant vs Software vs DIY (2026 Prices)
Compare CT600 filing costs in 2026: Taxpipe at £59 vs accountants at £200-500+ vs HMRC's free service (closed 31 March 2026). Real prices, real scenarios, real savings.
HMRC Free CT600 Filing Service Has Closed: What Directors Must Do Now
HMRC's free CT600 filing service closed permanently on 31 March 2026. Here's your complete action plan — deadlines, penalties, and the most affordable alternative at £59.
Best CT600 Software for Limited Companies (2026 Comparison)
Comparing the best CT600 corporation tax software for UK limited companies in 2026. Pricing, features, and which one is right for your business.