Self-Assessment for Companies
Revised and up to date for 2025/26. All UK companies must submit a corporation tax self-assessment return to HMRC. This course provides essential guidance to help you stay compliant and file with confidence.

Self-Assessment for Companies
This course will enable you to
About the course
All UK limited companies are required to submit a corporation tax self-assessment (CTSA) return to HMRC and pay the appropriate tax. For accountants, understanding how to complete and manage corporation tax returns is essential. This course equips you with the practical knowledge to support your clients through the CTSA process and remain compliant with HMRC requirements.
Corporation tax applies to most UK companies, and failing to meet HMRC's rules can result in significant penalties. This course explores who needs to pay corporation tax, current and historical tax rates, and how to identify liability. You’ll gain insight into how the CTSA system works — including how to register a company with HMRC, meet payment and filing deadlines, and maintain appropriate records.
You’ll also develop a detailed understanding of how to complete and submit a CTSA return, respond to HMRC enquiries, and navigate appeals processes. This course brings together key legislative knowledge and practical processes to help you advise confidently and stay on top of your corporation tax responsibilities.



