Publication date: 05.02.2026
I am a certified UK tax and accounting professional who works daily with clients across various industries — small businesses, international entrepreneurs, and non-residents entering the UK market. My role is to help them navigate HMRC requirements, build effective tax strategies, and keep their businesses compliant, stable, and financially protected. My approach combines strong academic training, international experience, and a practical understanding of how UK taxation works in real business environments. Clients rely on me for Self Assessment, CT600, VAT, CIS, company formation, and long-term tax advisory. I focus on accuracy, transparency, and tailored solutions, because every business has its own structure, risks, and goals. I work with both UK-based clients and those operating internationally, providing the support they need to manage their obligations confidently within the UK tax system.
In 2026, a growing UK limited company approached me, accountant and tax advisor Iryna Shmulenko, with an urgent need to prepare and submit its Corporation Tax Return (CT600) along with Annual Accounts. The business had expanded rapidly during its first trading years, but bookkeeping was incomplete and financial records were not properly organized. With HMRC and Companies House deadlines approaching, the company faced serious risks of late filing penalties, compliance investigations, and disruption of its operations.
Client's core challenges:
— Incomplete bookkeeping and missing financial documentation;
— Urgent requirement to prepare Annual Accounts from scratch;
— Corporation Tax Return (CT600) deadline approaching rapidly;
— Risk of HMRC penalties and Companies House enforcement action;
— Lack of tax planning and unclear allowable business deductions;
— Need for ongoing accounting structure and compliance support.
Strategic Approach to Corporate Tax Compliance and Financial Reporting
My initial step was to conduct a full financial and compliance audit of the company’s existing records, bank transactions, invoices, and expense documentation. This review revealed that the company lacked structured bookkeeping processes, which made accurate tax calculation and statutory reporting impossible without rebuilding the accounts.
I developed a tailored corporate tax strategy focusing on the following pillars:
- Restoring bookkeeping records and reconciling all company transactions.
- Preparing full statutory Annual Accounts in compliance with UK accounting standards.
- Completing and submitting the Corporation Tax Return (CT600) with accurate tax calculations.
- Identifying allowable deductions and business expenses to reduce tax exposure.
- Implementing an ongoing accounting and compliance framework for future reporting periods.
Implemented Solutions and Tax Measures
The implementation phase involved rebuilding the company’s financial accounts and ensuring timely submission of all required filings. I provided comprehensive support for:
- Restoring incomplete bookkeeping and organizing financial documentation.
- Preparing Annual Accounts ready for submission to Companies House.
- Completing CT600 filing with full supporting schedules and compliance disclosures.
- Advising on allowable deductions and tax-efficient structuring of business expenses.
- Establishing a monthly bookkeeping and reporting system to prevent future compliance issues.
Results and Benefits Realized
- Successfully submitted Annual Accounts and CT600 within statutory deadlines.
- Prevented late filing penalties and reduced HMRC compliance risks.
- Restored accurate bookkeeping and financial reporting from incomplete records.
- Optimized allowable deductions, reducing the company’s overall Corporation Tax liability.
- Implemented a sustainable accounting framework supporting long-term growth.
Client review
Frequently Asked Questions (FAQ)
Question
What is the purpose of the CT600 Corporation Tax Return?
Answer
CT600 is the official HMRC return that UK limited companies must submit annually to report taxable profits and calculate Corporation Tax liabilities.
Question
Can Annual Accounts be prepared if bookkeeping is incomplete?
Answer
Yes, professional accountants can restore records, reconcile transactions, and rebuild accounts from scratch to ensure accurate statutory reporting and compliance.
Question
How can companies avoid late filing penalties in the future?
Answer
Implementing structured bookkeeping processes, maintaining documentation throughout the year, and working with a tax advisor ensures timely submissions and reduces HMRC enforcement risks.
Thanks to comprehensive corporate tax filing support, the client successfully restored its financial records, submitted Annual Accounts and CT600 on time, and reduced compliance risks with HMRC and Companies House.
This case demonstrates the critical role of expert accounting and tax advisory services in ensuring UK corporate compliance, preventing penalties, and supporting sustainable business growth in 2026 and beyond.
