Introduction
Navigating the UK tax system can be complex for business owners, sole traders, and taxpayers alike. Appointing a professional accountant or tax adviser can save valuable time and ensure strict compliance with HM Revenue and Customs (HMRC). However, before a professional can discuss your financial affairs or submit filings on your behalf, you must formally grant them authorisation. This guide explains how the process works across different tax regimes and what your chosen representative can do for you.
Key Details
Authorising a paid professional to manage your tax affairs depends heavily on the specific tax service involved. While you can appoint an agent digitally using online services or your business tax account, you may sometimes need to rely on the traditional paper process using form 64-8.
Crucially, business owners and taxpayers remain legally responsible for their own tax compliance. If an agent prepares and submits documents such as your Self Assessment or corporation tax calculations, you must still review the information and confirm it is accurate beforehand.
Once authorised, agents can handle a wide variety of tasks depending on the service:
- Self Assessment: Submit tax returns, claim tax relief, manage income and expense updates, and finalise your overall tax position.
- Corporation Tax: Access company and financial records, and update communication details.
- VAT: View liabilities, submit VAT returns, handle registrations, and appeal late submission or late payment penalties.
- PAYE and Payroll: Access employer records or individual employment history, taxable benefits, and pension information.
- Making Tax Digital (MTD): Sign you up for MTD for Income Tax, maintain digital records, and send quarterly updates.
If digital authorisation is unavailable, you can use paper form 64-8. Doing so requires typing or writing clearly, using correct agent codes (such as a 6-character code for Self Assessment), avoiding covering letters unless strictly necessary, and posting the completed, signed document directly to HMRC. For compliance checks, a separate COMP1a form is required, whereas limited authorisations require a signed letter of authority sent to HMRC’s National Insurance contributions and Employers Office.
What This Means for UK Businesses
For UK companies, partnerships, landlords, and employers, working with qualified accounting services ensures that vital deadlines—ranging from VAT returns to payroll submissions—are met without error. Proper HMRC authorisation eliminates administrative friction, allowing your adviser to communicate directly with tax officials, resolve compliance checks swiftly, and manage tax planning efficiently. At NP & US, we streamline these procedures to keep your bookkeeping, compliance, and corporate tax obligations fully aligned with current legislation.
Summary
Granting a professional agent authority to deal with HMRC is an essential step in outsourcing your financial management. Whether through digital portals or paper form 64-8, proper authorisation covers everything from Self Assessment and VAT to corporation tax and payroll. Staying compliant protects your business from unnecessary penalties and ensures smooth communication with tax authorities.
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Need Professional Advice?
If you are interested to learn more, feel free to contact us on the below to ensure you are complying today.
Telephone: 0203 4688 788
